WO2025198260A1 - Dispositif de transmission de signal de diffusion utilisant de multiples antennes de transmission et multiplexage par répartition en couches, procédé l'utilisant - Google Patents

Dispositif de transmission de signal de diffusion utilisant de multiples antennes de transmission et multiplexage par répartition en couches, procédé l'utilisant

Info

Publication number
WO2025198260A1
WO2025198260A1 PCT/KR2025/003319 KR2025003319W WO2025198260A1 WO 2025198260 A1 WO2025198260 A1 WO 2025198260A1 KR 2025003319 W KR2025003319 W KR 2025003319W WO 2025198260 A1 WO2025198260 A1 WO 2025198260A1
Authority
WO
WIPO (PCT)
Prior art keywords
polarization
mimo
preamble
subframe
signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/KR2025/003319
Other languages
English (en)
Korean (ko)
Inventor
박성익
안성준
권선형
임보미
최영민
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Electronics and Telecommunications Research Institute ETRI
Original Assignee
Electronics and Telecommunications Research Institute ETRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR1020250029930A external-priority patent/KR20250154926A/ko
Priority claimed from KR1020250029940A external-priority patent/KR20250140452A/ko
Application filed by Electronics and Telecommunications Research Institute ETRI filed Critical Electronics and Telecommunications Research Institute ETRI
Publication of WO2025198260A1 publication Critical patent/WO2025198260A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0426—Power distribution
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/28—Arrangements for simultaneous broadcast of plural pieces of information
    • H04H20/33—Arrangements for simultaneous broadcast of plural pieces of information by plural channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04H—BROADCAST COMMUNICATION
    • H04H20/00—Arrangements for broadcast or for distribution combined with broadcast
    • H04H20/65—Arrangements characterised by transmission systems for broadcast
    • H04H20/71—Wireless systems
    • H04H20/72—Wireless systems of terrestrial networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path

Definitions

  • the present invention relates to a broadcast signal transmission/reception system that simultaneously supports layered division multiplexing technology and MIMO (Multi-Input Multi-Output) technology, and more particularly, to a bootstrap/preamble transmission technology.
  • MIMO Multi-Input Multi-Output
  • the latest terrestrial digital broadcasting standards such as ATSC 3.0, have attempted to overcome the transmission capacity limitations of a single broadcast frequency by applying multiple antenna technologies such as MIMO (Multiple Input Multiple Output), and have adopted layered division multiplexing technology in addition to TDM (Time Division Multiplexing) or FDM (Frequency Division Multiplexing) to support multiple services simultaneously.
  • MIMO Multiple Input Multiple Output
  • TDM Time Division Multiplexing
  • FDM Frequency Division Multiplexing
  • MIMO used in ATSC 3.0 is a technology that increases transmission capacity by transmitting two data streams on a single RF (Radio Frequency) channel using orthogonal polarization antennas.
  • the orthogonal polarization antennas are composed of two antennas whose polarizations are orthogonal to each other, and it takes into account the environment in which both vertical polarization antennas and horizontal polarization antennas are installed at the transmitter and receiver.
  • This type of MIMO is called 2X2 cross-polarized MIMO.
  • each polarization antenna can be referred to as antenna #1 (ANT 1) and antenna #2 (ANT 2), and in this case, antenna #1 can be a vertical polarization antenna and antenna #2 a horizontal polarization antenna, or conversely, antenna #1 can be a horizontal polarization antenna and antenna #2 a vertical polarization antenna.
  • Hierarchical division multiplexing is somewhat more complex than TDM and FDM, but it offers a high level of flexibility and improved system performance.
  • Layered division multiplexing refers to a system that combines multiple layers into a single transmission layer. In its simplest form, a system with two layers—a core layer and an enhanced layer—is considered.
  • the core layer typically refers to a layer with higher reception robustness than the enhanced layer.
  • the transmit power allocated to the core layer is significantly greater than that allocated to the enhanced layer, inducing the receiver to prioritize decoding of the core layer.
  • the power ratio of the enhanced layer to the core layer is called the injection level, and the injection level information is transmitted to the receiver through L1 signaling.
  • Korean Patent Publication No. 10-2018-0132525 proposes a structure that combines MIMO and layered division multiplexing (LDM) technology for broadcast signal transmission and reception. Specifically, Korean Patent Publication No. 10-2018-0132525 discloses two structures: one in which MIMO is applied to both the core and enhanced layers, and one in which MIMO is applied to only one of the core or enhanced layers.
  • LDM layered division multiplexing
  • the receiver When MIMO is applied to a broadcast signal transmission/reception system, the receiver must be equipped with two antennas (a vertically polarized antenna and a horizontally polarized antenna) to fully restore the transmitted MIMO signal, and a conventional single-antenna receiver cannot receive a signal transmitted using the MIMO method. In other words, since MIMO separates a single service into two different streams and then transmits the separated streams to each antenna, a single-antenna receiver cannot restore the original service.
  • MIMO can be applied to both the core layer and the enhanced layer when applying LDM and MIMO technologies together.
  • the core layer can use SISO (Single Input Single Output) and the enhanced layer can use MIMO.
  • SISO Single Input Single Output
  • MIMO Multiple Input Single Output
  • SISO may not separate a single service into multiple streams and transmit them independently. Even when two antennas transmit the same signal, it can still be considered SISO.
  • Korean Patent Publication No. 10-2023-0130564 discloses an LDM and MIMO combined structure in which SISO is applied to the core layer and MIMO is applied to the enhanced layer.
  • a SISO transmission signal is generated for the core layer
  • a MIMO transmission signal is generated for the enhanced layer.
  • the SISO receiver does not consider the MIMO signal (considering it as noise) and restores the core layer signal
  • the MIMO receiver first restores the SISO signal (core layer signal) and then removes it from the received signal, and then restores the received signal from which the SISO signal has been removed using the MIMO method.
  • No. 10-2023-0130564 only presents LDM and its rough combination structure when SISO and MIMO are used together, and is completely silent about the bootstrap/preamble transmission method in the layered division multiplexing system where SISO and MIMO are used together.
  • An object of the present invention is to efficiently transmit/receive bootstrap/preamble signals when using hierarchical division multiplexing and MIMO technology together.
  • an object of the present invention is to efficiently transmit/receive bootstrap/preamble signals in a situation where SISO subframes and MIMO subframes (including MIMO subframes to which LDM is applied) are mixed.
  • a broadcast signal transmission device includes a subframe signal generation unit that outputs a first polarization signal corresponding to a first polarization and a second polarization signal corresponding to a second polarization; and a transmission signal generation unit that generates a first polarization transmission signal including a first preamble corresponding to the first polarization and generates a second polarization transmission signal including a second preamble corresponding to the second polarization.
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • the subframe signal generation unit can generate the first polarization signal and the second polarization signal based on at least one of one or more Non-MIMO subframes; one or more MIMO subframes; one or more first type layered MIMO subframes; or one or more second type layered MIMO subframes.
  • the power of the preamble symbol corresponding to the second preamble may refer to the data symbol power of the first subframe that activates the second polarization after the mute corresponding to the Non-MIMO subframe.
  • the power of the preamble symbol corresponding to the second preamble may be lower than the power of the preamble symbol corresponding to the first preamble.
  • a broadcast signal transmission method includes the steps of outputting a first polarization signal corresponding to a first polarization and a second polarization signal corresponding to a second polarization; and the steps of generating a first polarization transmission signal including a first preamble corresponding to the first polarization and generating a second polarization transmission signal including a second preamble corresponding to the second polarization.
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • the first polarization signal and the second polarization signal may be generated based on any one or more of: one or more Non-MIMO subframes; one or more MIMO subframes; one or more first type layered MIMO subframes; or one or more second type layered MIMO subframes.
  • the power of the preamble symbol corresponding to the second preamble may refer to the data symbol power of the first subframe that activates the second polarization after the mute corresponding to the Non-MIMO subframe.
  • the power of the preamble symbol corresponding to the second preamble may be lower than the power of the preamble symbol corresponding to the first preamble.
  • a method for receiving a broadcast signal includes the steps of: receiving a first polarization transmission signal including a first preamble corresponding to a first polarization and a second polarization transmission signal including a second preamble corresponding to a second polarization; and restoring a data stream through decoding corresponding to at least one of the first polarization and the second polarization.
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • bootstrap/preamble signals can be efficiently transmitted/received.
  • the present invention can efficiently transmit/receive bootstrap/preamble signals in a situation where SISO subframes and MIMO subframes (including MIMO subframes to which LDM is applied) are mixed.
  • the present invention can prevent collision between signaling information for a legacy SISO receiver and signaling information for a MIMO receiver when a transmission signal to which LDM and MIMO are applied together is transmitted.
  • Figures 1 and 2 are diagrams showing two transmission examples in which SISO is applied to the core layer and MIMO is applied to the enhanced layer.
  • FIG. 3 is a block diagram showing an example of a broadcast signal transmission device according to one embodiment of the present invention.
  • Fig. 4 is a block diagram showing an example of the LDM coupling unit illustrated in Fig. 3.
  • Figure 5 is a diagram showing an example of a SISO distributed pilot pattern corresponding to SP3_2.
  • FIG. 6 is a diagram showing an example of a Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2.
  • FIG. 7 is a diagram showing an example of a null pilot encoded MIMO distributed pilot pattern corresponding to MP3_2.
  • FIG. 8 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted only through one of two MIMO antennas.
  • FIG. 9 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through both MIMO antennas.
  • Figure 10 is a diagram comparing a SISO distributed pilot pattern and a MIMO distributed pilot pattern.
  • FIGS. 12 to 14 are diagrams showing broadcast signal frames transmitted through two antennas when MIMO subframes are transmitted.
  • FIGS. 15 to 17 are diagrams showing broadcast signal frames transmitted via two antennas when a first type layered MIMO subframe is transmitted.
  • FIGS. 18 to 22 are diagrams showing broadcast signal frames transmitted by two antennas when a second type layered MIMO subframe is transmitted.
  • Figure 23 is a diagram showing an example of a broadcast signal frame when a non-MIMO subframe is the first subframe.
  • FIGS. 24 to 27 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 23.
  • FIGS. 29 and 30 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 28.
  • FIG. 31 is a diagram showing an example of a broadcast signal frame when a second type layered MIMO subframe is the first subframe.
  • FIGS. 32 and 33 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 31.
  • FIG. 34 is a diagram showing another example of a broadcast signal frame when the second type layered MIMO subframe is the first subframe.
  • FIGS. 35 and 36 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 34.
  • Figure 37 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.
  • Figure 38 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.
  • Figure 39 is a block diagram showing a computer system configuration according to one embodiment of the present invention.
  • Figures 1 and 2 are diagrams showing two transmission examples in which SISO is applied to the core layer and MIMO is applied to the enhanced layer.
  • the SISO method can be applied to the core layer and MIMO can be applied only to the enhanced layer, considering compatibility with existing single-antenna receivers.
  • the SISO signal (LEGACY SERVICE) of the core layer is transmitted only through one (VERTICAL) of the two MIMO antennas (VERTICAL, HORIZONTAL), and the other MIMO antenna (HORIZONTAL) does not transmit the core layer signal.
  • two MIMO antennas (VERTICAL, HORIZONTAL) transmit the SISO signal (LEGACY SERVICE) of the same core layer in the core layer, and transmit two MIMO signals (STREAM 1, STREAM 2) in the enhanced layer, respectively.
  • the SISO signal transmitted to the core layer is transmitted through only one antenna, and in the example illustrated in FIG. 2, the SISO signal transmitted to the core layer is transmitted through both antennas.
  • LDM and MIMO technologies are used together in this combined form of SISO and MIMO, backward compatibility with existing SISO receivers must be guaranteed, so L1 signaling must be applicable to both SISO and MIMO receivers. Therefore, from the perspective of existing SISO receivers, L1 signaling fields must be transmitted in the same manner as in the existing SISO transmission method to ensure normal operation of the SISO receiver.
  • FIG. 3 is a block diagram showing an example of a broadcast signal transmission device according to one embodiment of the present invention.
  • Figure 3 shows an example of a transmitter configuration in which a SISO signal is transmitted through a core layer and a MIMO signal is transmitted through an enhanced layer.
  • a broadcast signal transmission device includes a core layer signal generation unit (310), an enhanced layer MIMO signal generation unit (320), an LDM combining unit (330), and a transmission signal generation unit (340).
  • the core layer signal generation unit (310) generates a core layer signal (SISO signal).
  • the core layer signal generation unit (310) includes an input formatting unit (311) and a core layer BICM (Bit-Interleaved Coded Modulation) unit (312).
  • BICM Bit-Interleaved Coded Modulation
  • the input formatting unit (311) generates packetized data (baseband packets) in units of processing blocks of the transmission system.
  • the transmission system can classify packets to which the same BICM (Bit Interleaved Coded Modulation) and transmission signal generation parameters are applied and define them as the same PLP (Physical Layer Pipe).
  • BICM Bit Interleaved Coded Modulation
  • PLP Physical Layer Pipe
  • the enhanced layer MIMO signal generation unit (320) generates enhanced layer MIMO (Multiple Input Multiple Output) signals.
  • the enhanced layer MIMO signal generation unit (320) includes an input formatting unit (321), an enhanced layer BICM unit (322), and a MIMO precoder (323).
  • the input formatting unit (321) generates packetized data (baseband packets) in units of processing blocks of the transmission system.
  • the transmission system can classify packets to which the same BICM (Bit Interleaved Coded Modulation) and transmission signal generation parameters are applied and define them as the same PLP (Physical Layer Pipe).
  • BICM Bit Interleaved Coded Modulation
  • PLP Physical Layer Pipe
  • the enhanced layer BICM unit may include an FEC (Forward Error Correction) unit, a BIL (Bit Interleaver) unit, and a MIMO (Multi-Input Multi-Output) MAP (mapping) unit.
  • the FEC unit may apply channel coding to baseband packets to generate FEC frames, which are groups of bits.
  • the channel coding may be a single-structure method, or may be a method composed of multiple stages, such as inner and outer coding.
  • the BIL unit may perform bit interleaving on the FEC frames output from the FEC unit.
  • even-numbered bits in a bit group can be mapped to data cells for the first antenna (first polarization), and odd-numbered bits can be mapped to data cells for the second antenna (second polarization).
  • first polarization can be vertical polarization
  • second polarization can be horizontal polarization.
  • polarization can be the orientation of the electric field vector of a radiated electromagnetic wave with respect to the horizon as seen from the antenna.
  • polarization can describe the orientation of the wave emitted from. This orientation can be planar or circular.
  • the first antenna may be replaced with the first polarization
  • the second antenna may be replaced with the second polarization
  • Two groups of data cells are input to the MIMO precoder (323).
  • the MIMO precoder (323) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit.
  • the stream combiner may combine two data cells inputted and output them.
  • the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them.
  • the phase hopping unit may change the phase of the data cells inputted and output them.
  • all three sub-blocks may operate while being activated, all may operate while being deactivated, or only some of the blocks may operate while being activated.
  • each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block.
  • the MIMO precoder (323) illustrated in FIG. 3 can output two data cells to be output through the first antenna (first polarization) and the second antenna (second polarization).
  • the LDM combiner (330) hierarchically multiplexes one of the core layer signal and the enhanced layer MIMO signals to output a first polarization signal corresponding to the first polarization (first antenna), and outputs the other one of the enhanced layer MIMO signals as a second polarization signal corresponding to the second polarization (second antenna).
  • the LDM coupling unit (330) can output the second polarization signal with unity power.
  • the transmission signal generation unit (340) generates a first polarization transmission signal using the first polarization signal, and generates a second polarization transmission signal using the second polarization signal.
  • the transmission signal generation unit (340) includes framing & interleaving units (341, 342) and waveform generators (345, 346).
  • Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (341) on the first polarization signal output through the LDM combining unit (330).
  • the output of the framing & interleaving unit (341) is input to the waveform generator (345) and output to the first antenna as the first polarization transmission signal.
  • Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (342) on the second polarization signal output through the LDM coupling unit (330).
  • the output of the framing & interleaving unit (342) is input to the waveform generator (346) and output to the second antenna as the second polarization transmission signal.
  • the framing & interleaving units (341, 342) illustrated in FIG. 3 can each generate a signal corresponding to a frame to be transmitted via an antenna using data cells input as input.
  • the framing & interleaving units (341, 342) may or may not activate and perform time interleaving for each input data cell.
  • the framing & interleaving units (341, 342) may each perform framing for configuring preamble symbols and subframes for each data cell.
  • the preamble symbol may not include a data cell.
  • frequency interleaving may or may not be activated and applied.
  • the first polarization transmission signal and the second polarization transmission signal may each include a preamble, but only one of them may include a preamble.
  • the first preamble and the second preamble may each include a 1-bit L1B_mimo_scattered_pilot_encoding field set to 0. Furthermore, the first preamble and the second preamble may include the same L1 signaling information.
  • this preamble can be applied not only to the polarization (antenna) transmitting the preamble but also to the other polarization (antenna).
  • the signaling fields included in this preamble can be used by both the first polarization and the second polarization.
  • the grouped data cells which are outputs of the framing & interleaving units (341, 342), are input to the waveform generators (345, 346).
  • the waveform generators (345, 346) may each perform an inverse fast Fourier transform (IFFT) after pilot insertion and insert a guard interval symbol.
  • IFFT inverse fast Fourier transform
  • the waveform generators (345, 346) may each generate a bootstrap symbol and output it by positioning it at the very beginning of the transmission frame.
  • the waveform generator (346) may apply power scaling for the second polarization in the IFFT stage according to an injection level corresponding to the second polarization (which may be the same as the injection level corresponding to the first polarization). At this time, the power of the second polarization transmission signal may be lower than the power of the first polarization transmission signal.
  • Information about the scattered pilots inserted through the waveform generators (345, 346) may be included in the preamble generated by the framing & interleaving units (341, 342).
  • FIG. 4 is a block diagram showing an example of the LDM coupling unit (330) illustrated in FIG. 3.
  • the LDM coupling unit (330) includes an injection level controller (410), a coupler (420), and a power normalizer (430).
  • the LDM combiner (330) hierarchically multiplexes a core layer signal (S C ) and one (S E,1 ) of the enhanced layer MIMO signals (S E,1 , S E ,2 ) to output a first polarization signal ( ⁇ (S C + ⁇ S E,1 )) corresponding to the first polarization (POLARIZATION #1), and outputs the other (S E ,2 ) of the enhanced layer MIMO signals (S E,1 , S E,2 ) as a second polarization signal corresponding to the second polarization.
  • the injection level controller (410) adjusts the power of one (S E,1 ) of the enhanced layer MIMO signals (S E,1 , S E,2 ) for hierarchical division multiplexing.
  • the coupler (420) couples the core layer signal (S C ) and one of the enhanced layer signals ( ⁇ S E,1 ) whose power is controlled by the injection level controller (410).
  • the power normalizer (430) performs transmission power normalization and outputs a first polarization signal.
  • the LDM combiner illustrated in FIG. 4 combines a core layer signal and an enhanced layer signal through hierarchical division multiplexing for the first polarization, but for the second polarization, the combination of the two layer signals through hierarchical division multiplexing is not performed and the input MIMO signal (S E,2 ) is output as is. That is, in the structure illustrated in FIG. 4, constellation-superposed signals are transmitted only in the first polarization (POLARIZATION #1), and the second polarization (POLARIZATION #2) can transmit a dedicated MIMO stream composed solely of enhanced layer cells.
  • the first polarization transmission signal and the second polarization transmission signal may be generated using only the first MIMO distributed pilot encoding among the first MIMO distributed pilot encoding that transmits pilots to the same OFDM cell positions for the first polarization and the second polarization, and the second MIMO distributed pilot encoding that transmits pilots to different OFDM cell positions for the first polarization and the second polarization.
  • the second MIMO distributed pilot encoding may correspond to a first group in which only pilots for the first polarization are transmitted with valid power and pilots for the second polarization are transmitted with null power, and a second group in which only pilots for the second polarization are transmitted with valid power and pilots for the first polarization are transmitted with null power.
  • the first MIMO distributed pilot encoding may be Walsh-Hadamard encoding
  • the second MIMO distributed pilot encoding may be null pilot encoding
  • At this time, at least one of the first polarization transmission signal and the second polarization transmission signal may include a preamble.
  • the preamble may include a 1-bit L1B_mimo_scattered_pilot_encoding field set to 0.
  • the 1-bit L1B_mimo_scattered_pilot_encoding field set to 0 can indicate both a MIMO pilot pattern with Walsh-Hadamard encoding and the SISO pilot pattern simultaneously.
  • a collision may occur between the pilot pattern for the MIMO terminal and the pilot pattern for the SISO terminal (between the signaling information of the pilot pattern for the MIMO terminal and the signaling information of the pilot pattern for the SISO terminal).
  • L1B_first_sub_scattered_pilot_pattern for the first subframe
  • L1D_scattered_pilot_pattern for other subframes
  • These fields are signaling fields commonly used for SISO transmission and MIMO transmission, and the receiver can distinguish whether it is a SISO distributed pilot pattern or a MIMO distributed pilot pattern by combining these fields with other MIMO-related fields (e.g., L1B_first_sub_mimo (for the first subframe) and L1D_mimo (for other subframes)) and then find out the exact distributed pilot pattern.
  • MIMO-related fields e.g., L1B_first_sub_mimo (for the first subframe) and L1D_mimo (for other subframes)
  • L1B_first_sub_mimo and L1D_mimo can indicate whether MIMO transmission is applied to the corresponding subframe.
  • the scattered pilot pattern may be interpreted as a SISO pattern as shown in Table 1 below, or as a MIMO pattern as shown in Table 2 below.
  • Table 1 shows the signaling formats of L1D_scattered_pilot_pattern and L1B_first_sub_scattered_pilot_pattern for SISO.
  • Table 2 shows the signaling formats of L1D_scattered_pilot_pattern and L1B_first_sub_scattered_pilot_pattern for MIMO.
  • SP SISO Pilot
  • MP MIMO Pilot
  • both the SISO receiver and the MIMO receiver must be able to simultaneously receive accurate scattered pilot pattern information through a common signaling field, L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern. This means that L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern must be compatible with both SISO and MIMO.
  • L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern is 00000
  • the SISO receiver must perform channel estimation through SP3_2 in Table 1
  • the MIMO receiver must perform channel estimation through MP3_2 in Table 2.
  • the MIMO distributed pilot pattern used in ATSC 3.0 systems is defined using either Walsh-Hadamard encoding or null-pilot encoding.
  • the pilot pattern corresponding to Walsh-Hadamard encoding is such that both the first polarization and the second polarization transmit their respective pilots at the same OFDM cell locations. That is, Walsh-Hadamard encoding designs the sequences corresponding to the pilots for the first polarization and the sequences corresponding to the pilots for the second polarization to be orthogonal, so that only the corresponding pilots can be extracted from each transmission channel.
  • the pilot pattern corresponding to the null pilot encoding is such that the second polarization is muted at the position where the first polarization transmits the pilot, and the first polarization is muted at the position where the second polarization transmits the pilot.
  • the first polarization (first antenna) portion of the MIMO Walsh-Hadamard distributed pilot pattern transmits pilot signals identical to the SISO distributed pilot pattern to the same OFDM cell location.
  • the first polarization (first antenna) portion of the MIMO null-pilot distributed pilot pattern transmits pilot signals at only half of the pilot positions of the SISO distributed pilot pattern.
  • Figures 5, 6 and 7 illustrate SISO scattered pilot patterns, MIMO Walsh-Hadamard scattered pilot patterns and MIMO null-pilot scattered pilot patterns when 5-bit L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern is 00000.
  • FIG. 6 is a diagram showing an example of a Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2.
  • the Walsh-Hadamard encoded MIMO distributed pilot pattern illustrated in FIG. 6 transmits the same pilots as illustrated in FIG. 5 in both group 1 positions and group 2 positions for the first polarization. At this time, for the second polarization, the same pilots as those for the first polarization are transmitted in group 1 positions, and pilots that are opposite in phase to the pilots for the first polarization are transmitted in group 2 positions.
  • the same pilots as the SISO distributed pilot pattern illustrated in FIG. 5 are transmitted in the first polarization, and in the second polarization, only some pilots are transmitted with their phases reversed at the same positions as the SISO distributed pilot pattern illustrated in FIG. 5.
  • the OFDM cell locations of the Walsh-Hadamard encoded MIMO distributed pilot pattern corresponding to MP3_2 are basically the same as the OFDM cell locations of the null-pilot encoded MIMO distributed pilot pattern corresponding to MP3_2, except for the grouping.
  • null-pilot encoded MIMO distributed pilot pattern illustrated in FIG. 7 transmits pilots only at group 1 positions for the first polarization, and transmits pilots only at group 2 positions for the second polarization.
  • the null-pilot encoded MIMO distributed pilot pattern illustrated in FIG. 7 transmits pilot signals only at half of the pilot positions (group 1 positions) of the SISO distributed pilot pattern distributed pilot pattern illustrated in FIG. 5 in the first polarization.
  • the null-pilot encoded MIMO distributed pilot pattern transmits pilot signals only at the other half of the pilot positions (group 2 positions) of the SISO distributed pilot pattern distributed pilot pattern illustrated in FIG. 5 in the second polarization.
  • the core layer and the enhanced layer may need to use the same pilot signal to prevent increased receiver complexity and reduce the burden of receiver memory usage.
  • the broadcast signal transmitter having the structure described through FIGS. 3 and 4 transmits a broadcast signal combining SISO and MIMO, taking into account a conventional single-antenna receiver, and the single-antenna receiver can only receive the first polarization signal.
  • the SISO receiver will use the interference signal transmitted in the second polarization for pilot-based channel estimation using the corresponding PLP (Physical Layer Pipe), which may result in misestimation.
  • PLP Physical Layer Pipe
  • the existing ATSC 3.0 broadcast system sets the L1B_mimo_scattered_pilot_encoding field (L1-Basic signaling field) to 0 in the following two cases.
  • L1B_first_sub_mimo for the first subframe
  • L1D_mimo for other subframes
  • L1B_first_sub_mimo and L1D_mimo may be fields indicating whether MIMO is applied to the corresponding subframe (in principle, they are set to 1 if MIMO is applied).
  • the MIMO receiver may operate based on other MIMO-related fields other than these fields to identify the MIMO pilot pattern.
  • the core layer transmits a SISO signal and only the enhanced layer applies MIMO
  • a signaling collision may not occur if other MIMO subframes in the transmission frame apply the null pilot pattern.
  • a single scattered pilot pattern identification field L1B_first_sub_scattered_pilot_pattern or L1D_scattered_pilot_pattern
  • the Walsh-Hadamard pilot pattern may be applied to the enhanced layer of the broadcast signal transmission device of FIGS. 3 and 4 regardless of the value signaled in L1B_mimo_scattered_pilot_encoding.
  • the 1-bit signaling field L1B_mimo_scattered_pilot_encoding can be set to 0, which can indicate both a MIMO pilot pattern with Walsh-Hadamard encoding and the SISO pilot pattern simultaneously.
  • the core layer and the enhanced layer can share pilots not only when MIMO is applied to both the core layer and the enhanced layer, but also when SISO is applied to the core layer and MIMO is applied only to the enhanced layer.
  • FIG. 8 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted only through one of two MIMO antennas.
  • the example illustrated in Fig. 8 is an example in which the Walsh-Hadamard pilot pattern is applied, and it can be seen that the distributed pilot pattern is applied equally to the core layer and the enhanced layer in the first polarization ( V-POL ).
  • the phases of the pilots of some cell positions in the second polarization ( H-POL ) are opposite to those of the pilots in the first polarization.
  • FIG. 9 is a diagram showing an example of a transmission signal configuration when a SISO signal is transmitted through both MIMO antennas.
  • the core layer signal and the enhanced layer signal are transmitted together in the first polarization ( V-POL ) and the second polarization ( H-POL ).
  • the example illustrated in Fig. 9 is an example in which the Walsh-Hadamard pilot pattern is applied. It can be seen that the distributed pilot pattern is applied equally to the core layer and the enhanced layer in the first polarization ( V-POL ) and the second polarization (H - POL ). In the example illustrated in Fig. 9, the phases of the pilots of some cell positions in the second polarization (H-POL) are opposite to those of the pilots in the first polarization.
  • Figure 10 is a diagram comparing a SISO distributed pilot pattern and a MIMO distributed pilot pattern.
  • the Walsh-Hadamard encoded MP3_2 MIMO distributed pilot pattern is completely identical to the SISO SP3_2 distributed pilot pattern.
  • the second polarization H-POL
  • the phases of the pilots at the pilot positions corresponding to the second group are inverted.
  • Fig. 11 is a block diagram showing an example of a broadcast signal transmission device using multiple transmission antennas and hierarchical division multiplexing.
  • a broadcast signal transmission device using multiple transmission antennas and layered division multiplexing includes a core layer MIMO signal generation unit (1110), an enhanced layer MIMO signal generation unit (1120), an LDM combining unit (1130), an L1 signaling generation unit (1140), and a transmission signal generation unit (1150).
  • the core layer MIMO signal generation unit (1110) generates core layer MIMO signals.
  • the core layer MIMO signal generation unit (1110) may include a core layer FEC (Forward Error Correction) encoder (1111), a core layer bit-interleaver (1112), a core layer MIMO demux (DEMUX; Demultiplexer) (1113), core layer symbol mappers (1114, 1115), and a core layer MIMO precoder (1116).
  • a core layer FEC Forward Error Correction
  • a core layer bit-interleaver 1112
  • a core layer MIMO demux DEMUX; Demultiplexer
  • core layer symbol mappers (1114, 1115
  • a core layer MIMO precoder (1116).
  • the core layer FEC encoder (1111) can apply channel coding to baseband packets corresponding to the core layer to generate FEC frames (FEC packets), which are groups of bits.
  • the channel coding may be a single-structure method or a method composed of multiple stages, such as inner and outer coding.
  • the core layer bit interleaver (1112) can perform bit interleaving on FEC frames output from the core layer FEC encoder (1111).
  • the core layer MIMO demux (1113) and core layer symbol mappers (1114, 1115) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the core layer bit-interleaver (1112). That is, the core layer MIMO demux (1113) can group the input bit stream according to the modulation order and the number of multiple antennas in order to convert it into data cells. At this time, the core layer MIMO demux (1113) can map even index bits in the FEC-encoded bit stream that has undergone bit interleaving to the first antenna (polarization) and odd index bits to the second antenna (polarization). At this time, the bit stream corresponding to each group can be different depending on the modulation order and the number of multiple antennas.
  • the core layer symbol mappers (1114, 1115) map the output of the core layer MIMO demux (1113) to constellations corresponding to groups of bits corresponding to each antenna (polarization) output, and generate data cells corresponding to each antenna output.
  • even-numbered bits in a bit group may be mapped to data cells for a first antenna (ANTENNA 1), and odd-numbered bits may be mapped to data cells for a second antenna (ANTENNA 2).
  • the grouping of each bit or the constellation mapping of the bits using the same in the core layer symbol mappers (1114, 1115) may be performed using various methods not illustrated.
  • Groups of two different data cells are input to a core layer MIMO precoder (1116).
  • the core layer MIMO precoder (1116) can perform signal processing for spatial multiplexing and can adjust the first antenna (polarization) signal and the second antenna (polarization) signal in units of OFDM cells (constellation symbols).
  • the core layer MIMO precoder (1116) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit.
  • the stream combiner may combine two data cells inputted and output them.
  • the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them.
  • the phase hopping unit may change the phase of the data cells inputted and output them.
  • all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated.
  • each sub-block may output a different signal or the same signal depending on the channel coding rate and modulation order applied to the data cells inputted to each sub-block.
  • the core layer MIMO precoder (1116) illustrated in FIG. 11 can output two data cells to be output through the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2). That is, two output signals are generated from the core layer MIMO signal generation unit (1110), one of which is a signal for transmission using the first antenna (ANTENNA 1), and the other is a signal for transmission using the second antenna (ANTENNA).
  • the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) may correspond to a first polarization and a second polarization, respectively. That is, the first antenna (ANTENNA 1) may correspond to a first polarization, and the second antenna (ANTENNA 2) may correspond to a second polarization.
  • the first polarization may be vertical polarization
  • the second polarization may be horizontal polarization.
  • polarization can be the orientation of the electric field vector of a radiated electromagnetic wave with respect to the horizon as seen from the antenna.
  • polarization can describe the orientation of the wave emitted from. This orientation can be planar or circular.
  • the first antenna may be replaced with the first polarization and the second antenna may be replaced with the second polarization.
  • the enhanced layer MIMO signal generation unit (1120) generates enhanced layer MIMO signals.
  • the enhanced layer MIMO signal generation unit (1120) may include an enhanced layer FEC (Forward Error Correction) encoder (1121), an enhanced layer bit-interleaver (1122), an enhanced layer MIMO demux (DEMUX; Demultiplexer) (1123), enhanced layer symbol mappers (1124, 1125), and an enhanced layer MIMO precoder (1126).
  • an enhanced layer FEC Forward Error Correction
  • an enhanced layer bit-interleaver (1122
  • an enhanced layer MIMO demux (DEMUX; Demultiplexer)
  • EMUX Demultiplexer
  • enhanced layer symbol mappers (1124, 1125
  • an enhanced layer MIMO precoder an enhanced layer MIMO precoder
  • the enhanced layer FEC encoder (1121) can apply channel coding to baseband packets corresponding to the enhanced layer to generate FEC frames (FEC packets), which are groups of bits.
  • the channel coding may be a single-structure method or a method composed of multiple stages, such as inner and outer coding.
  • the enhanced layer bit-interleaver (1122) can perform bit interleaving on FEC frames output from the enhanced layer FEC encoder (1121).
  • the enhanced layer MIMO demux (1123) and the enhanced layer symbol mappers (1124, 1125) can generate data cells for transmitting output to each of the multiple antennas for the output bit stream of the enhanced layer bit-interleaver (1122). That is, the enhanced layer MIMO demux (1123) can group the input bit stream according to the modulation order and the number of multiple antennas in order to convert it into data cells. At this time, the enhanced layer MIMO demux (1123) can map even index bits in the FEC-encoded bit stream that has undergone bit interleaving to the first antenna (polarization) and odd index bits to the second antenna (polarization). At this time, the bit stream corresponding to each group can be different depending on the modulation order and the number of multiple antennas.
  • Enhanced layer symbol mappers (1124, 1125) map the output of the enhanced layer MIMO demux (1123) to constellations corresponding to groups of bits corresponding to each antenna (polarization) output, and generate data cells corresponding to each antenna output.
  • even-numbered bits in a bit group may be mapped to data cells for a first antenna (ANTENNA 1), and odd-numbered bits may be mapped to data cells for a second antenna (ANTENNA 2).
  • the grouping of each bit or the constellation mapping of the bits using the same in the enhanced layer symbol mappers (1124, 1125) may be performed using various methods not illustrated.
  • Groups of two different data cells are input to an enhanced layer MIMO precoder (1126).
  • the enhanced layer MIMO precoder (1126) can perform signal processing for spatial multiplexing and can adjust the first antenna (polarization) signal and the second antenna (polarization) signal in units of OFDM cells (constellation symbols).
  • the enhanced layer MIMO precoder (1126) may include a streaming combiner, an IQ polarization interleaving unit, and a phase hopping unit.
  • the stream combiner may combine two data cells inputted and output them.
  • the IQ polarization interleaving unit may exchange the quadrature components of the two data cells inputted and output them.
  • the phase hopping unit may change the phase of the data cells inputted and output them.
  • all three sub-blocks may be activated and operated, all may be deactivated and operated, or only some of the blocks may be activated and operated.
  • the core layer MIMO signals may be generated based on core layer MIMO precoding, and the enhanced layer MIMO signals may be generated based on enhanced layer MIMO precoding.
  • the core layer MIMO precoding and the enhanced layer MIMO precoding may be performed using at least one of stream combining, IQ polarization interleaving, and phase hopping, respectively.
  • phase hopping corresponding to the core layer is activated, phase hopping corresponding to the enhanced layer can be activated.
  • the stream combining, the IQ polarization interleaving and the phase hopping may correspond to the first MIMO field, the second MIMO field and the third MIMO field, respectively.
  • the second MIMO field corresponding to the core layer and the second MIMO field corresponding to the enhanced layer may be set identically, and the third MIMO field corresponding to the core layer and the third MIMO field corresponding to the enhanced layer may be set identically.
  • the LDM combiner (1130) performs layered division multiplexing on the core layer MIMO signals and the enhanced layer MIMO signals to generate a first superposition signal (first polarization signal) corresponding to the first polarization and a second superposition signal (second polarization signal) corresponding to the second polarization.
  • the LDM coupling unit (1130) may include injection level controllers (1131, 1132), couplers (1133, 1134) and power normalizers (1135, 1136).
  • the transmission power of the enhanced layer MIMO signals for the first antenna (ANTENNA 1) and the second antenna (ANTENNA 2) is adjusted by the injection level controllers (1131, 1132) according to a predetermined power injection level (IL).
  • the power of the enhanced layer MIMO signal for the first antenna (ANTENNA 1) is adjusted by the injection level controller (1131)
  • the power of the enhanced layer MIMO signal for the second antenna (ANTENNA 2) is adjusted by the injection level controller (1132).
  • the injection levels can each represent a power ratio of the enhanced layer to the core layer, and information for signaling the injection level can be included in the L1 signaling fields.
  • the enhanced layer MIMO signal for the first antenna (ANTENNA 1) with adjusted power is added to the core layer MIMO signal for the first antenna (ANTENNA 1) by a combiner (1133), and the enhanced layer MIMO signal for the second antenna (ANTENNA 2) with adjusted power is added to the core layer MIMO signal for the second antenna (ANTENNA 2) by a combiner (1134).
  • the signal added through the coupler (1133) goes through transmission power normalization by the power normalizer (1135) and is output as a first superposition signal (first polarization signal), and the signal added through the coupler (1134) goes through transmission power normalization by the power normalizer (1136) and is output as a second superposition signal (second polarization signal).
  • the transmission signal generation unit (1150) generates a first polarization transmission signal including a first preamble corresponding to the first polarization and a second polarization transmission signal including a second preamble corresponding to the second polarization.
  • the transmission signal generation unit (1150) includes framing & interleaving units (1151, 1152) and waveform generators (1153, 1154).
  • Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (1151) on the first superposition signal output through the power normalizer (1135).
  • the output of the framing & interleaving unit (1151) is input to the waveform generator (1153) and output to the first antenna as the first polarization transmission signal.
  • Time interleaving, frame generation (including preamble), and frequency interleaving can be performed in the framing & interleaving unit (1152) on the second superposition signal output through the power normalizer (1136).
  • the output of the framing & interleaving unit (1152) is input to the waveform generator (1154) and output to the second antenna as a second polarization transmission signal.
  • the framing & interleaving units (1151, 1152) illustrated in FIG. 11 can each generate a signal corresponding to a frame to be transmitted via an antenna using data cells inputted as input.
  • the framing & interleaving units (1151, 1152) may or may not activate and perform time interleaving for each input data cell.
  • the framing & interleaving units (1151, 1152) may perform framing for each data cell, configuring a preamble symbol and a subframe.
  • the preamble symbol may not include a data cell.
  • frequency interleaving may or may not be activated and applied.
  • the grouped data cells which are the outputs of the framing & interleaving units (1151, 1152), are input to the waveform generators (1153, 1154).
  • the waveform generators (1153, 1154) may each perform an inverse fast Fourier transform (IFFT) after pilot insertion and insert a guard interval symbol.
  • the waveform generators (1153, 1154) may each generate a bootstrap symbol and output it by positioning it at the very beginning of the transmission frame.
  • each of the waveform generators (1153, 1154) may activate and apply the MISO (Multiple-Input Single-Output) signal processing function or may deactivate and not apply it.
  • MISO Multiple-Input Single-Output
  • the L1 signaling generation unit (1140) can generate injection level signaling information regarding two injection levels corresponding to the enhanced layer MIMO signals.
  • the injection level information (IL INFO) for the enhanced layer MIMO signal for the first antenna (or polarization) and the injection level information (IL INFO) for the enhanced layer MIMO signal for the second antenna (or polarization) are used by the injection level controllers (1131, 1132) and are also transmitted to and used by the power normalizers (1135, 1136).
  • the power normalizers (1135, 1136) each multiply the size of the combined signal by a normalizing factor calculated from the injection level information to adjust the power of the input signal to an appropriate level.
  • the injection level information (IL INFO) for the enhanced layer MIMO signal for the first antenna (or polarization) and the injection level information (IL INFO) for the enhanced layer MIMO signal for the second antenna (or polarization) are transmitted to the L1 signaling generation unit (1140), so that L1 signaling information to be included in the preamble and transmitted is generated. That is, the injection level signaling information included in the L1 signaling information is modulated and transmitted by the framing & interleaving units (1135, 1136) by being included in the preamble.
  • the injection levels of the injection level controllers (1131, 1132) may be set to the same injection level or may be set to different injection levels.
  • the first preamble generated by the framing & interleaving unit (1151) and the second preamble generated by the framing & interleaving unit (1152) may each include only the first injection level information (when the injection levels of the injection level controllers (1131, 1132) are the same) or may include both the first injection level information and the second injection level information (when the injection levels of the injection level controllers (1131, 1132) are different).
  • the first injection level signaling information included in the first preamble and the first injection level signaling information included in the second preamble may be the same.
  • the second injection level signaling information included in the first preamble and the second injection level signaling information included in the second preamble may be the same.
  • the entire L1 signaling information included in the first preamble may be identical to the entire L1 signaling information included in the second preamble. That is, the first preamble transmitted for the first polarization and the second preamble transmitted for the second polarization may be configured with the same modulation signals and set identically, and their transmission powers may be identical or different.
  • the first preamble and the second preamble may include the same 5-bit injection level signaling information corresponding to the injection levels.
  • the enhanced layer MIMO signal for the first antenna/polarization and the enhanced layer MIMO signal for the second antenna/polarization may be power-regulated corresponding to the same injection level or may be power-regulated corresponding to different injection levels.
  • the first preamble corresponding to the first antenna (polarization) and the second preamble corresponding to the second antenna (polarization) may include the same 5-bit injection level field (L1D_plp_ldm_injection_level).
  • the injection level controllers (1131, 1132) and power normalizers (1135, 1136) illustrated in FIG. 11 can all operate based on an injection level corresponding to the same 5-bit injection level field (L1D_plp_ldm_injection_level). That is, the same injection level value can be shared for the first antenna (polarization) and the second antenna (polarization).
  • the LDM coupling unit (1130) illustrated in FIG. 11 and the LDM coupling unit (330) illustrated in FIG. 3 can output a first polarization signal corresponding to the first polarization and a second polarization signal corresponding to the second polarization.
  • the LDM coupling unit (1130) illustrated in FIG. 11 and the LDM coupling unit (330) illustrated in FIG. 3 may correspond to a subframe signal generation unit.
  • the subframe signal generation unit may correspond to a MIMO signal generation unit (same structure as 1110 or 1120 of FIG. 11) that generates the output of the MIMO precoder as a first polarization signal and a second polarization signal in a MIMO transmission structure according to the existing ATSC 3.0 standard for the SL MIMO subframe described later.
  • the first polarization signal and the second polarization signal which are the outputs of the MIMO precoder, may be input to the first framing & interleaving unit and the second framing & interleaving unit, respectively.
  • the output of the first framing & interleaving unit may be input to the first waveform generator, and the output of the second framing & interleaving unit may be input to the second waveform generator.
  • the output of the first waveform generator can become the first polarization transmission signal
  • the output of the second waveform generator can become the second polarization transmission signal.
  • the first framing & interleaving unit, the second framing & interleaving unit, the first waveform generator, and the second waveform generator can constitute a transmission signal generation unit.
  • the existing MIMO transmission method that is not LDM can be referred to as single-layer MIMO transmission.
  • the subframe signal generation unit can output a first polarization signal corresponding to the first polarization and a second polarization signal corresponding to the second polarization.
  • the transmission signal generation unit (1150) illustrated in FIG. 11 and the transmission signal generation unit (340) illustrated in FIG. 3 can generate a first polarization transmission signal including a first preamble corresponding to the first polarization, and can generate a second polarization transmission signal including a second preamble corresponding to the second polarization.
  • the transmission signal generation unit can include the first framing & interleaving unit, the second framing & interleaving unit, the first waveform generator, and the second waveform generator described above.
  • the subframes described in the present invention may be one of the following four types.
  • a Non-MIMO subframe refers to a subframe to which MIMO is not applied, and can refer to a transmission method that can be received with a single reception antenna because spatial multiplexing (SM) or polarization multiplexing (PM) is not applied.
  • a Non-MIMO subframe may correspond to a SISO (Spatial-Input Single-Output) transmission signal and a MISO (Multiple-Input Single-Output) transmission signal.
  • a MIMO subframe is a MIMO subframe corresponding to the existing ATSC 3.0 standard, and may refer to a single layer (SL) MIMO subframe to which layered division multiplexing (LDM) is not applied.
  • the MIMO subframe may correspond to the MIMO transmitter structure of the existing ATSC 3.0 standard.
  • a first type layered MIMO subframe may correspond to a transmitter structure in which MIMO is applied to both the core layer and the enhanced layer. That is, a first type layered MIMO subframe may correspond to the transmitter structure illustrated in FIG. 11.
  • the second type layered MIMO subframe may correspond to a transmitter structure in which SISO is applied to the core layer and MIMO is applied to the enhanced layer. That is, the second type layered MIMO subframe may correspond to the transmitter structure illustrated in FIGS. 3 and 4.
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • the power of the preamble symbol refers to the power of the data symbol, which may mean that the power of the preamble symbol is set to be equal to the power of the data symbol.
  • the subframe signal generation unit can generate the first polarization signal and the second polarization signal based on at least one of one or more Non-MIMO subframes; one or more MIMO subframes; one or more first type layered MIMO subframes; or one or more second type layered MIMO subframes.
  • the power of the preamble symbol corresponding to the second preamble may refer to the data symbol power of the first subframe that activates the second polarization after the mute corresponding to the Non-MIMO subframe.
  • the power of the preamble symbol corresponding to the second preamble may be lower than the power of the preamble symbol corresponding to the first preamble.
  • the bootstrap and preamble can be transmitted in one of the two ways below.
  • Both the first polarization (ANT1) and the second polarization (ANT2) transmit bootstrap and preamble.
  • a broadcast signal to which MIMO technology is applied when a broadcast signal to which MIMO technology is applied is transmitted, one of two methods can be used for bootstrap and preamble transmission: a method in which the first polarization (ANT1) and the second polarization (ANT2) transmit the same signal, and a method in which only one of the first polarization (ANT1) and the second polarization (ANT2) transmits the bootstrap and preamble signal and the other is muted.
  • FIGS. 12 to 14 are diagrams showing broadcast signal frames transmitted through two antennas when MIMO subframes are transmitted.
  • the same bootstrap and preamble signals are transmitted in the first polarization (ANT1) and the second polarization (ANT2).
  • the preamble of the first polarization (first preamble) and the preamble of the second polarization (second preamble) may include the same preamble symbols, and the transmission power of the preambles may also be the same.
  • a mute occurs in the bootstrap and preamble sections of the second polarization (ANT2), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted through the first polarization (ANT1).
  • a mute occurs in the bootstrap and preamble sections of the first polarization (ANT1), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted via the second polarization (ANT2).
  • FIGS. 15 to 17 are diagrams showing broadcast signal frames transmitted via two antennas when a first type layered MIMO subframe is transmitted.
  • the same bootstrap and preamble signals are transmitted in the first polarization (ANT1) and the second polarization (ANT2).
  • the preamble of the first polarization (first preamble) and the preamble of the second polarization (second preamble) may include the same preamble symbols, and the transmission power of the preambles may also be the same.
  • a mute occurs in the bootstrap and preamble sections of the second polarization (ANT2), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted through the first polarization (ANT1).
  • a mute occurs in the bootstrap and preamble sections of the first polarization (ANT1), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted via the second polarization (ANT2).
  • the injection levels of the two polarizations are depicted as being different from each other for convenience of explanation, but the injection levels of the two polarizations may be the same.
  • FIGS. 18 to 22 are diagrams showing broadcast signal frames transmitted by two antennas when a second type layered MIMO subframe is transmitted.
  • bootstrap and preamble signals are transmitted in the first polarization (ANT1) and the second polarization (ANT2).
  • the preamble of the first polarization (first preamble) and the preamble of the second polarization (second preamble) may include the same preamble symbols.
  • the transmission power of the preambles may be different from each other. That is, the transmission power of the bootstrap and preamble of the first polarization may be equal to the data transmission power of the first polarization, and the transmission power of the bootstrap and preamble of the second polarization may be equal to the data transmission power of the second polarization.
  • the transmission power of the bootstrap and preamble of the second polarization may be lower than the transmission power of the bootstrap and preamble of the first polarization.
  • the power of the enhanced layer signal (ANT1 SIG.) of the first antenna (ANT1, first polarization) and the power of the enhanced layer signal (ANT2 SIG.) of the second antenna (ANT2, second polarization) may be the same.
  • the first antenna (ANT1, first polarization) and the second antenna (ANT2, second polarization) may commonly use the L1D_plp_ldm_injection_level field.
  • bootstrap and preamble signals are transmitted in the first polarization (ANT1) and the second polarization (ANT2).
  • the preamble of the first polarization (first preamble) and the preamble of the second polarization (second preamble) may include the same preamble symbols.
  • the transmission power of the preambles may be the same or different.
  • the transmission power of the bootstrap and preamble of the first polarization may be the same as the data transmission power of the first polarization, and the transmission power of the bootstrap and preamble of the second polarization may be different from the data transmission power of the second polarization.
  • a mute occurs in the bootstrap and preamble sections of the second polarization (ANT2), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted through the first polarization (ANT1).
  • a mute occurs in the bootstrap and preamble sections of the first polarization (ANT1), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted via the second polarization (ANT2).
  • the transmission power of the bootstrap and preamble of the second polarization can be equal to the data transmission power of the second polarization.
  • a mute occurs in the bootstrap and preamble sections of the first polarization (ANT1), preventing the bootstrap and preamble from being transmitted.
  • the preamble and bootstrap can be transmitted via the second polarization (ANT2).
  • the transmission power of the bootstrap and preamble of the second polarization may differ from the data transmission power of the second polarization.
  • the data transmission power may ultimately represent the transmission power of the subframe containing data.
  • the broadcast signal frame may include multiple subframes, and as described above, the subframes may be one of four types.
  • the bootstrap and preamble are shown together, but as mentioned above, the bootstrap and preamble can be transmitted sequentially.
  • the bootstrap and preamble signals may be transmitted with a power equal to the output power of the subframe that first activates each antenna within that transmit frame.
  • a system in which transmission of one or more subframe(s) of the four types is performed is a system in which both MIMO transmission (SL MIMO subframe, first type layered MIMO subframe, and second type layered MIMO subframe) and Non-MIMO transmission (Non MIMO subframe) transmission are performed, and in such a system, a specific method for transmitting bootstrap and preamble signals and a form of Non-MIMO signal transmission need to be presented.
  • SL MIMO and layered MIMO can be collectively referred to as MIMO signals (MIMO subframes, type 1 layered MIMO subframes, and type 2 layered MIMO subframes).
  • Non-MIMO a transmission method that can be received with a single receiving antenna because spatial multiplexing (SM) or polarization multiplexing (PM) is not applied can be referred to as Non-MIMO.
  • Non-MIMO can include SISO and MISO (Multi-Input Single-Output).
  • the signal can be transmitted in one of the following two types.
  • the following two transmission methods can be considered for the bootstrap and preamble signals.
  • a transmitter capable of transmitting a MIMO subframe, a first type layered MIMO subframe, or a second type layered MIMO subframe can transmit a broadcast signal in various ways depending on the combination between [Type 1], [Type 2], [Transmission method 1], and [Transmission method 2].
  • the transmission method needs to be determined with consideration to the continuity of transmission power.
  • the power of the second polarization transmission signal corresponding to the second polarization may be lower than the power of the second polarization transmission signal corresponding to the first polarization.
  • the uneven transmission power of the second type layered MIMO may need to be taken into account for bootstrap and preamble transmission.
  • Figure 23 is a diagram showing an example of a broadcast signal frame when a non-MIMO subframe is the first subframe.
  • the first subframe of the broadcast signal frame is a Non-MIMO subframe, followed by a MIMO subframe.
  • both Non-MIMO subframes are transmitted with two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 24 can follow a combination of [Type 1] and [Transmission Method 1].
  • the first subframe that activates the first polarization and the first subframe that activates the second polarization are both Non-MIMO subframes, and the transmission powers of the preamble symbols of the preambles of the first polarization and the second polarization can all be set to be equal to the transmission power of the data symbols corresponding to the Non-MIMO subframe.
  • the Non-MIMO subframe is transmitted only with the first polarization among the two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 25 can follow a combination of [Type 2] and [Transmission Method 1].
  • the bootstrap/preamble signals of the first polarization and the second polarization can be transmitted simultaneously in synchronization. That is, the bootstrap/preamble signal of the second polarization can be transmitted before the first subframe of the first polarization, which is a non-MIMO subframe.
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the transmission power of the MIMO subframe, which is the first subframe that activates the second polarization.
  • the transmission power of the MIMO subframe is the same in both polarizations, and the transmission power of the non-MIMO subframe of the first polarization is the same as the transmission power of the MIMO subframe of the subsequent first polarization, so the transmission power of the bootstrap/preamble signal of the first polarization and the transmission power of the bootstrap/preamble signal of the second polarization can be the same.
  • the Non-MIMO subframe is transmitted only with the first polarization among the two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 26 can follow a combination of [Type 2] and [Transmission Method 1].
  • the bootstrap/preamble signal of the second polarization may be transmitted after the first subframe of the first polarization, which is a Non-MIMO subframe.
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the transmission power of the MIMO subframe, which is the first subframe that activates the second polarization.
  • the transmission power of the MIMO subframe is the same in both polarizations, and the transmission power of the non-MIMO subframe of the first polarization is the same as the transmission power of the MIMO subframe of the subsequent first polarization, so the transmission power of the bootstrap/preamble signal of the first polarization and the transmission power of the bootstrap/preamble signal of the second polarization can be the same.
  • the Non-MIMO subframe is transmitted only with the first polarization among the two antennas (polarizations), and only the first polarization is activated for bootstrap and preamble signal transmission.
  • Fig. 27 can follow a combination of [Type 2] and [Transmission Method 2].
  • Figure 28 is a diagram showing an example of a broadcast signal frame when a MIMO subframe is the first subframe.
  • the first subframe of the broadcast signal frame is a MIMO subframe, followed by a non-MIMO subframe.
  • the MIMO subframe may include the aforementioned MIMO subframe and a first type layered MIMO subframe.
  • FIGS. 29 and 30 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 28.
  • both Non-MIMO subframes are transmitted with two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 29 can follow a combination of [Type 1] and [Transmission Method 1].
  • the first subframe that activates the first polarization and the first subframe that activates the second polarization are both MIMO subframes, and the transmission powers of the preamble symbols of the preambles of the first polarization and the second polarization can all be set to be equal to the transmission power of the data symbols corresponding to the MIMO subframe.
  • the Non-MIMO subframe is transmitted only with the first polarization among the two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 30 can follow a combination of [Type 2] and [Transmission Method 1].
  • FIG. 31 is a diagram showing an example of a broadcast signal frame when a second type layered MIMO subframe is the first subframe.
  • the first subframe of the broadcast signal frame is a second type layered MIMO subframe, followed by a non-MIMO subframe.
  • FIGS. 32 and 33 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 31.
  • both Non-MIMO subframes are transmitted with two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 32 can follow a combination of [Type 1] and [Transmission Method 1].
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the signal power of the second type layered MIMO subframe, which is the first subframe of the second polarization.
  • the second type layered MIMO subframe signal which is the first subframe of the second polarization
  • the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the second polarization can be different from the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the first polarization.
  • the Non-MIMO subframe is transmitted only with the first polarization among the two antennas (polarizations), and both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • Fig. 33 can follow a combination of [Type 2] and [Transmission Method 1].
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the signal power of the second type layered MIMO subframe, which is the first subframe of the second polarization.
  • the second type layered MIMO subframe signal which is the first subframe of the second polarization
  • the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the second polarization can be different from the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the first polarization.
  • FIG. 34 is a diagram showing another example of a broadcast signal frame when the second type layered MIMO subframe is the first subframe.
  • the first subframe of the broadcast signal frame is a second type layered MIMO subframe, followed by a MIMO subframe.
  • the MIMO subframe may include the aforementioned MIMO subframe and the first type layered MIMO subframe.
  • FIGS. 35 and 36 are diagrams showing examples of broadcast signal frames transmitted by two antennas that can be applied to the example of FIG. 34.
  • both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the signal power of the second type layered MIMO subframe, which is the first subframe of the second polarization.
  • the second type layered MIMO subframe signal which is the first subframe of the second polarization
  • the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the second polarization can be different from the transmission power of the second type layered MIMO subframe signal, which is the first subframe of the first polarization.
  • both the first polarization and the second polarization are activated for bootstrap and preamble signal transmission.
  • the transmission power of the bootstrap/preamble signal of the second polarization can be set to be the same as the MIMO signal power of the second polarization.
  • the second type layered MIMO subframe signal which is the first subframe of the second polarization
  • the transmission power of the second type layered MIMO subframe signal which is the first subframe of the second polarization
  • the transmission power of the second type layered MIMO subframe signal can be different from the transmission power of the MIMO signal of the subsequent second polarization.
  • the present invention can transmit a bootstrap and a preamble signal with the same power as the output power of the subframe that first activates each antenna in the corresponding transmission frame, from each of the two MIMO antennas (in the case of FIGS. 24, 25, 29, 30, 32, 33, and 35).
  • the bootstrap and the preamble of the first polarization (antenna) and the second polarization (antenna) can be transmitted in synchronization with each other.
  • the following operation can be performed depending on whether it is [Type 1] transmission or [Type 2] transmission.
  • the bootstrap and preamble signals of the second polarization are transmitted with the same power as the non-MIMO subframe signal of the first subframe.
  • the bootstrap and preamble signals of the second polarization are transmitted with the same power as the first appearing MIMO subframe, the first type layered MIMO subframe, or the second type layered MIMO subframe signal.
  • the above-described embodiment can efficiently transmit bootstrap and preamble signals through MIMO antennas while minimizing the increase in complexity of the transmitter/receiver.
  • the present invention may transmit a bootstrap and a preamble signal with the same power as the output power of the first subframe within the corresponding transmission frame from each of the two MIMO antennas (as in the cases of FIGS. 24, 27, 29, 30, 32, 33, and 35).
  • the first subframe is a non-MIMO subframe and there is a MIMO subframe, a first type layered MIMO subframe, or a second type layered MIMO subframe within the transmission frame
  • the following operation may be performed depending on whether it is [Type 1] transmission or [Type 2] transmission.
  • the bootstrap and preamble signals of the second polarization are transmitted with the same power as the non-MIMO subframe signal of the first subframe.
  • the present invention transmits a bootstrap and a preamble signal with the same power as the output power of a subframe that first activates each antenna within a corresponding transmission frame, from each of two MIMO antennas, but when the first subframe period is muted, the bootstrap and the preamble can be transmitted immediately before the non-muted subframe period (in the case of FIGS. 24, 26, 29, 30, 32, 33, and 35). At this time, the bootstrap and the preamble of the first polarization (antenna) and the second polarization (antenna) can be transmitted at different times.
  • the first subframe is a Non-MIMO subframe, and there is a MIMO subframe, a first type layered MIMO subframe, or a second type layered MIMO subframe within the transmission frame, and it is a [Type 2] transmission, the following operation can be performed.
  • the bootstrap and preamble signals of the second polarization are transmitted with the same power as the signals of the first appearing MIMO subframe, the first type layered MIMO subframe, or the second type layered MIMO subframe.
  • the bootstrap and preamble signals of the second polarization are transmitted concatenated immediately before the first appearing MIMO subframe, the first type layered MIMO subframe, or the second type layered MIMO subframe.
  • the present invention transmits a bootstrap and a preamble signal at a power equal to the output power of a subframe that first activates each antenna within a corresponding transmission frame, from each of two MIMO antennas, but when the subframe that first activates the second antenna is a second-type layered MIMO subframe, the bootstrap and preamble signals can be transmitted at a power greater than the second-type layered MIMO subframe signal (the same power as the bootstrap and preamble transmission power of the first antenna) even from the second antenna that transmits only enhanced layer signals (in the case of FIG. 36).
  • Figure 37 is a flowchart illustrating a broadcast signal transmission method according to one embodiment of the present invention.
  • a broadcast signal transmission method outputs a first polarization signal corresponding to the first polarization and a second polarization signal corresponding to the second polarization (S3710).
  • a broadcast signal transmission method generates a first polarization transmission signal including a first preamble corresponding to the first polarization, and generates a second polarization transmission signal including a second preamble corresponding to the second polarization (S3720).
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • the power of the preamble symbol refers to the power of the data symbol, which may mean that the power of the preamble symbol is set to be equal to the power of the data symbol.
  • the subframe signal generation unit can generate the first polarization signal and the second polarization signal based on at least one of one or more Non-MIMO subframes; one or more MIMO subframes; one or more first type layered MIMO subframes; or one or more second type layered MIMO subframes.
  • the power of the preamble symbol corresponding to the second preamble may refer to the data symbol power of the first subframe that activates the second polarization after the mute corresponding to the Non-MIMO subframe.
  • the power of the preamble symbol corresponding to the second preamble may be lower than the power of the preamble symbol corresponding to the first preamble.
  • Figure 38 is a flowchart illustrating a broadcast signal receiving method according to one embodiment of the present invention.
  • a broadcast signal receiving method receives a first polarization transmission signal including a first preamble corresponding to a first polarization and a second polarization transmission signal including a second preamble corresponding to a second polarization (S3810).
  • the first preamble and the second preamble may include the same preamble symbols.
  • the power of the preamble symbol corresponding to the first preamble may reference the data symbol power of the first subframe activating the first polarization.
  • the power of the preamble symbol corresponding to the second preamble may reference the data symbol power of the first subframe activating the second polarization.
  • the power of the preamble symbol refers to the power of the data symbol, which may mean that the power of the preamble symbol is set to be equal to the power of the data symbol.
  • the subframe signal generation unit can generate the first polarization signal and the second polarization signal based on at least one of one or more Non-MIMO subframes; one or more MIMO subframes; one or more first type layered MIMO subframes; or one or more second type layered MIMO subframes.
  • the power of the preamble symbol corresponding to the second preamble may refer to the data symbol power of the first subframe that activates the second polarization after the mute corresponding to the Non-MIMO subframe.
  • the power of the preamble symbol corresponding to the second preamble may be lower than the power of the preamble symbol corresponding to the first preamble.
  • a broadcast signal receiving method restores a data stream through decoding corresponding to at least one of the first polarization and the second polarization (S3820).
  • the core layer stream can be restored through MIMO decoding corresponding to the first polarization and the second polarization.
  • Each step illustrated in FIGS. 37 and 38 may be performed in the order illustrated in FIGS. 37 and 38, in the reverse order, or simultaneously.
  • Figure 39 is a block diagram showing a computer system configuration according to one embodiment of the present invention.
  • the broadcast signal transmitting device, the broadcast signal receiving device and the individual components constituting these devices according to the embodiment can be implemented in a computer system (3900).
  • the computer system (3900) may include one or more processors (3910), memory (3930), user interface input devices (3940), user interface output devices (3950), and storage (3960) that communicate with each other via a bus (3920).
  • the computer system (3900) may further include a network interface (3970) connected to a network (3980).
  • the processor (3910) may be a central processing unit or a semiconductor device that executes programs or processing instructions stored in the memory (3930) or storage (3960).
  • the memory (3930) and storage (3960) may be storage media that include at least one of a volatile medium, a nonvolatile medium, a removable medium, a non-removable medium, a communication medium, or an information transmission medium.
  • the memory (3930) may include a ROM (3931) or a RAM (3932).
  • At this time, at least one program can be recorded in the memory (3930).
  • the processor (3910) can execute the program.
  • the program can perform each step illustrated in FIG. 37 or each step illustrated in FIG. 38.
  • the broadcast signal transmission device, method, and broadcast signal reception method according to the present invention are not limited to the configurations and methods of the embodiments described above, but the embodiments may be configured by selectively combining all or part of the embodiments so that various modifications can be made.

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Abstract

Un dispositif de transmission de signal de diffusion selon un mode de réalisation de la présente invention comprend : une unité de génération de signal de sous-trame permettant d'émettre en sortie un premier signal de polarisation correspondant à une première polarisation, et un second signal de polarisation correspondant à une seconde polarisation ; et une unité de génération de signal de transmission permettant de générer un premier signal de transmission de polarisation qui contient un premier préambule correspondant à la première polarisation, puis de générer un second signal de transmission de polarisation qui contient un second préambule correspondant à la seconde polarisation.
PCT/KR2025/003319 2024-03-18 2025-03-14 Dispositif de transmission de signal de diffusion utilisant de multiples antennes de transmission et multiplexage par répartition en couches, procédé l'utilisant Pending WO2025198260A1 (fr)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
KR10-2024-0037023 2024-03-18
KR20240037023 2024-03-18
KR10-2024-0053507 2024-04-22
KR20240053507 2024-04-22
KR1020250029930A KR20250154926A (ko) 2024-04-22 2025-03-07 다중 송신 안테나들과 계층 분할 다중화를 이용한 방송 신호 송신 장치 및 이를 이용한 방법
KR10-2025-0029940 2025-03-07
KR1020250029940A KR20250140452A (ko) 2024-03-18 2025-03-07 다중 송신 안테나들과 계층 분할 다중화를 이용한 방송 신호 송신 장치 및 이를 이용한 방법
KR10-2025-0029930 2025-03-07

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JP2020053980A (ja) * 2012-12-07 2020-04-02 サン パテント トラスト 送信装置、送信方法、受信装置、受信方法、集積回路、及びプログラム
US20220279231A1 (en) * 2019-08-02 2022-09-01 Maxell, Ltd. Broadcast receiving apparatus and display control method
KR20230066843A (ko) * 2021-11-08 2023-05-16 한국전자통신연구원 다중안테나 및 계층다중화를 이용한 방송 신호 송/수신 방법 및 이를 위한 장치
KR20230130564A (ko) * 2022-03-03 2023-09-12 한국전자통신연구원 계층 분할 다중화 기술과 다중 송수신 안테나 기술의 결합에 따른 전송 구조를 시그널링하는 방송 신호 송신 방법 및 이를 이용한 장치

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JP2020053980A (ja) * 2012-12-07 2020-04-02 サン パテント トラスト 送信装置、送信方法、受信装置、受信方法、集積回路、及びプログラム
KR20180133205A (ko) * 2017-06-05 2018-12-13 한국전자통신연구원 Miso와 레이어드 디비전 멀티플렉싱의 결합을 이용한 방송 신호 송/수신 방법 및 이를 위한 장치
US20220279231A1 (en) * 2019-08-02 2022-09-01 Maxell, Ltd. Broadcast receiving apparatus and display control method
KR20230066843A (ko) * 2021-11-08 2023-05-16 한국전자통신연구원 다중안테나 및 계층다중화를 이용한 방송 신호 송/수신 방법 및 이를 위한 장치
KR20230130564A (ko) * 2022-03-03 2023-09-12 한국전자통신연구원 계층 분할 다중화 기술과 다중 송수신 안테나 기술의 결합에 따른 전송 구조를 시그널링하는 방송 신호 송신 방법 및 이를 이용한 장치

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