WO2003103161A2 - Systeme de reception et de traitement de frequences radio - Google Patents

Systeme de reception et de traitement de frequences radio Download PDF

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Publication number
WO2003103161A2
WO2003103161A2 PCT/IB2003/002400 IB0302400W WO03103161A2 WO 2003103161 A2 WO2003103161 A2 WO 2003103161A2 IB 0302400 W IB0302400 W IB 0302400W WO 03103161 A2 WO03103161 A2 WO 03103161A2
Authority
WO
WIPO (PCT)
Prior art keywords
signal
end receiving
signals
processing unit
radio frequency
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.)
Ceased
Application number
PCT/IB2003/002400
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English (en)
Other versions
WO2003103161A3 (fr
Inventor
Gunnar Wetzker
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.)
Koninklijke Philips NV
Original Assignee
Koninklijke Philips Electronics NV
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Filing date
Publication date
Application filed by Koninklijke Philips Electronics NV filed Critical Koninklijke Philips Electronics NV
Priority to AU2003241092A priority Critical patent/AU2003241092A1/en
Publication of WO2003103161A2 publication Critical patent/WO2003103161A2/fr
Publication of WO2003103161A3 publication Critical patent/WO2003103161A3/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0874—Hybrid systems, i.e. switching and combining using subgroups of receive antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H04B1/20—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver
    • H04B1/205—Circuits for coupling gramophone pick-up, recorder output, or microphone to receiver with control bus for exchanging commands between units
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/0871—Hybrid systems, i.e. switching and combining using different reception schemes, at least one of them being a diversity reception scheme
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0882—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • H04B7/082—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection selecting best antenna path
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/084—Equal gain combining, only phase adjustments
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
    • H04B7/0842—Weighted combining
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0882—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity
    • H04B7/0885—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity with combination
    • 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
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0882—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity
    • H04B7/0888—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using post-detection diversity with selection

Definitions

  • the invention relates to a radio frequency receiving and processing system comprising a plurality of front-end receiving units, a processing unit, and a bus system coupling the front-end receiving units to the processing units.
  • the invention further relates to a method for receiving and processing radio frequency signals by means of a radio frequency receiving and processing system, comprising a plurality of front-end receiving units, a processing unit, and a bus system coupling the front-end receiving units to the processing unit.
  • European patent application EP 0952 674 A2 discloses a system as described in the opening paragraph for use in automobiles. It includes tuners for a plurality of receivers for receiving various types of signals including an AM/FM broadcast signal, a TN broadcast signal and a GPS signal.
  • the tuners are separated from receiver bodies and integrally incorporated in an antenna section (a plurality of antenna elements and an AM/FM reception circuit and a TV reception circuit) including a plurality of antenna elements.
  • the tuners are controlled by a digital control signal via a local access network (LAN) provided in an automobile for controlling reception of radio frequency signals.
  • LAN local access network
  • optical bus systems are in the form of the MOST system or EDB-1394, which will be hereinafter described in detail.
  • the reception of wireless signals is improved by the usage of antenna diversity.
  • Antenna diversity means that the same radio frequency signal is received in multiple places. Through combining the received signals, the improvement in signal reception quality takes place.
  • the advantage obtained from antenna diversity is highest if the signals received at the different antennas are uncorrelated.
  • the correlation between signals received on different antennas decreases with the distance between the antennas. Therefore, the antennas should be placed at least a quarter of a wavelength apart from each other.
  • the distance between the antennas is a multiple of a wavelength. For FM radio systems, this results in a distance in the range of meters.
  • a disadvantage of the system disclosed in EP 0 952 674 A2 is that this involves expensive wiring of the individual antennas to the other components of the receiving unit for instance by means of coaxial cables.
  • each of the front-end receiving units is coupled to a separate antenna, and is arranged for converting a radio frequency signal received at the antenna to a digitized demodulated signal and for transmitting the digitized demodulated signal to the processing unit via the bus system; and the processing unit is arranged for generating an output signal in dependence on digitized demodulated signals received via the bus system.
  • An advantage of the system according to the invention is that the main part of the received signals is processed after transmission via the bus system.
  • Each of the front-end receiving units only needs to convert a radio frequency signal of one antenna into a digitized demodulated signal. This reduces the required processing power of the front-end receiving units.
  • a further advantage of the system according to the invention is that antenna diversity may be applied more effectively, since individual antennas may be placed as far apart as required without requiring extensive wiring, because the front-end receiving units locally convert received radio frequency signals to digitized demodulated signals and digitized demodulated signals require less bandwidth than unprocessed radio frequency signals.
  • a method according to the invention for receiving and processing radio frequency signals as described in the second paragraph is characterized in that each of the front-end receiving units receives a radio frequency signal at a separate antenna, converts the received radio frequency signal to a digitized demodulated signal, and transmits the digitized demodulated signal to the processing unit via the bus system; and the processing unit generates an output signal in dependence on digitized demodulated signals received via the bus system.
  • Fig. 1 is an embodiment of an radio frequency receiving and processing system according to the invention
  • Fig. 2 is a block diagram of an embodiment of a front receiver unit for use in a radio frequency receiving and processing system according to the invention
  • Fig. 3 is a block diagram of an embodiment of a quality controller for use in a radio frequency receiving and processing system according to the invention.
  • Fig. 1 shows an overview of an embodiment of an radio frequency (RF) receiving and processing system according to the invention.
  • the RF receiving and processing system comprises antennas Al, A2, and A3, front-end circuits 2, 16, 22, front-end controllers 4, 18 and 24, bus interfaces 6, 8, 20 and 26, an optical bus system 28 and a central processing unit 10.
  • each of the front-end receiving units 1, 3 and 5 comprises an antenna Al, A2, and A3, a front-end circuit 2, 16, 22, a front-end controller 4, 18, 24 and a bus interface 6, 20, 26, respectively.
  • the antenna Al is connected to the front- end circuit 2.
  • the front-end circuit 2 transmits two signals SI 1 and S12 to the front-end controller 4.
  • Signal SI 1 represents all control signals coming from the front-end circuit 2
  • S12 represents all data-information signals (like audio-signals and radio data (RDS) signals) coming from the front-end circuit 2.
  • the front-end controller 4 transmits a signal S13 to the bus interface 6 and receives a signal S14 from the bus interface 6.
  • the signal S13 is a multiplexed signal generated from the signals SI 1 and S12.
  • the signal S13 comprises the information signal and the control signal indicating the quality of the received signal.
  • the signal S14 comprises a control signal coming from the central processing unit 10.
  • the bus interface 6 connects the front-end receiving unit 1 to the optical bus
  • the optical bus system 28 transmits the information from the front-end receiving units 1, 3, 5 to the central processing unit 10, or vice versa.
  • the bus interface 8 connects the central processing unit 10 to the optical bus 28.
  • the bus interface 8 receives the signal S15 from the central processing unit 10.
  • the signal S15 is the same signal as S14.
  • the signal S16 which is transmitted from the bus interface 8 to the central processing unit 10 contains the information signal to be transmitted to the central processing unit.
  • the terminals 12 and 14 output the processed signals for further processing, for example amplification, of the received and processed signals.
  • the other two front-end receiver units 3, 5 shown in Fig. 1 are the same as the described front-end receiver unit 1.
  • Signals S21 and S31 represent all control signals coming from front-end controllers 16 and 22, respectively.
  • Signals S22 and S32 represent all data information signals coming from front-end controllers 16 and 22, respectively.
  • the front-end controllers 18 and 24 transmit the respective signals S23 and S33 to the respective signals S23 and S33 to the respective bus interfaces 20 and 26.
  • the front-end controllers 18 and 24 receive the respective signals S24 and S34 from the respective bus interfaces 20 and 26.
  • the optical bus system may be the media oriented systems transfer MOST system or the IDB-1394.
  • the MOST is a serial network with a maximum of 64 devices. Data transmission is organized in blocks. Every block contains 16 frames. A frame consists of 64 bytes. The first byte is used for a preamble and a boundary descriptor and is followed by the data information. A maximum of 60 bytes can be transported in one frame. The data information itself can be split up in a first part reserved for synchronous transmission and a second part for asynchronous transmission. The last three bytes of a frame are dedicated to two control bytes and some frame, status and parity bits.
  • one device of the network is the timing master providing the generation and transport of the system clock, the frames, and the blocks. All other devices are slaves.
  • the slaves derive their clock from the MOST network.
  • the frame rate can be chosen between 30 and 50 kHz (certain devices prefer certain frame rates - e.g. 44.1 kHz for CD-ROM).
  • the advantage of having a synchronous network is that expensive buffering in the devices is avoided.
  • the bit error rate BER should be less than 10 "10 .
  • the function of the different fields of is explained hereafter briefly.
  • the preamble contains four bits and is needed for synchronization of the devices to the bit stream.
  • the boundary descriptor also contains four bits and indicates how many bits are transmitted synchronously.
  • the boundary descriptor represents and integral number N of the set ⁇ 0, 6, ....15 ⁇ . Multiplied by four, the number of synchronously transmitted bytes in a frame is obtained. The number of synchronously transmitted bytes therefore equals 4N.
  • All other bits, frame control, status and parity bit (3 bytes), within the frame are for management purposes on the network level.
  • the first two bytes of these fields are reserved for a control channel.
  • the parity bit indicates reliable data content and is used for error detection and phase loop operation.
  • the protocol for data transmission will now be described.
  • the synchronous data field is then shared by different devices through time division multiple access (TDMA). This means that e.g. device A always uses the first four bytes, device B the second four bytes, etc..
  • TDMA time division multiple access
  • the asynchronous data field is organized in a token ring manner.
  • the objective of the asynchronous data field is to provide packet-oriented data transmission.
  • the bandwidth of this channel is controlled, as already explained, by the boundary descriptor.
  • the device which owns the token is always allowed to send its information.
  • the maximum packet length given by 48 bytes (and therefore spreading one packet over more than one frame) is possible.
  • a control data message is 32 bytes long and hence again spreading of one message over several frames is possible.
  • the bus standard IDB-1394 will now be described.
  • the IDB-1394 standard offers the same features as MOST but offers with a maximum of 400 Mbyte/s it provides a much larger bandwidth.
  • D. Anderson, "Fire Wire System Architecture", 2 nd edition, 1999, Mindshare, Inc.. By employing an optical bus for the transmission of the received signals, the game obtained through the diversity system due to an increase of distance between the antennas is maximized while no extra wiring is required which keeps costs low.
  • the received signals have to be demodulated to a certain extent prior to transmission via the bus system.
  • the demodulation has to be effected depends on the used diversity combining method. Combining of the different signals takes place, for example, in a central unit.
  • Selection combining means that the signal offering the best received signal quality is transmitted via the optical bus and further processed by the central receiver unit.
  • any front-end receiver has to demodulate the received signal completely. For example, in the case of FM radio, this is equal to demodulation until the audio and data signals of the received signals. The audio and data signals are then digitized and sent via the optical bus.
  • every receiver has to generate a quality indication signal providing information about the received signal quality. This may be a simple received signal strength indicator of a signal indicating the distortion of the channel introduced by multi-path propagation.
  • This detection signal has to be transmitted from any receiver constantly via the optical bus to the central processing unit.
  • the central processing unit decides which front-end receiver unit has to transmit its received information (e.g. audio, data signals) via the optical bus to the central processing unit.
  • the content of the different signals shown in Fig. 1 for the selection combining is clarified in table 1 and table 2.
  • Table 2 shows the function of each signal for selection combining for all other Antennas Ay (x not equal to y).
  • a simplified version of selection combining is switched combining.
  • only one receiver sends a control signal as well as one or multiple information signals via the bus to the central processing unit. If the quality of the control signals drops below a given threshold, the central processing unit stops the transmission of the active front-end receiver unit via the bus and initiates the transmission from another one, until the quality level drops again below the threshold.
  • switched combining saves bandwidth on the optical bus, because the number of transmitted control signals is reduced to one.
  • the content of the different signals for switched combining is clarified in tables 3 and 4.
  • Table 3 shows the function of each signal for switched combining when Ax is the antenna being selected for transmission via the bus. Table 3 - function of each signal for switched combining when Ax is the antenna being selected for transmission via the bus.
  • Table 4 shows the function of each signal for switched combining for all other non-selected Antennas Ay (x not equal to y).
  • the different received signals are weighted with a complex factor and added up afterwards.
  • Table 5 shows the function of each signal for maximum ration combining when all antennas are active.
  • Table 5 - function of each signal for maximum ration combining when all antennas are active.
  • FM frequency modulation
  • Table 6 shows the function of each signal for equal gain combining when all antennas are active.
  • Table 7 shows the function of each signal for other forms of combining when all antennas are active.
  • Table 7 - function of each signal for other forms of combining when all antennas are active.
  • Fig. 2 is a block diagram of an embodiment of a front receiver unit for use in a radio frequency receiving and processing system according to the invention.
  • Fig. 2 shows an embodiment of a front-end circuit 2 as used in, for example, FM car radio.
  • the signal 30 is first passed through an antenna filter 32. After passing through the antenna filter 32, the signal is amplified by a low noise amplifier (LNA) 34 and the signal is then supplied to the input terminal of the automatic gain confrol circuit (AGC) 36.
  • LNA low noise amplifier
  • AGC automatic gain confrol circuit
  • the automatic gain control circuit 36 provides a signal with a stable power level at its output terminal.
  • the signal is then mixed by a mixer 38 with a signal coming from a voltage-controlled oscillator (NCO) 40.
  • NCO voltage-controlled oscillator
  • the intermediate frequency signal is filtered by the channel filter 42.
  • the filtered intermediate frequency signal is then digitized by the analog to digital converter (A/D) 44.
  • the digitized intermediate frequency signal is then mixed in a second mixer 46 with a signal coming from the voltage-controlled oscillator 48 down to the baseband.
  • the baseband signal is demodulated by the demodulator 50.
  • the output terminals 54, 56, 58 of the demodulator 50 provide the demodulated baseband signal to the bus and to the quality controller 52.
  • the demodulated signals 54, 56 and 58 could be, the audio signals of the left and right side as well as the radio data signal (RDS). It is assumed that all signals 54, 56, 58 are digital. This includes the case where they represent digitized analog signals as they occur in FM radio.
  • the quality controller 52 receives the signals 54, 56, 58 and the input signal of the demodulator 50 at its input terminals.
  • the output signal of the quality controller 52 is provided at the output terminal 60.
  • the function of the quality controller 52 is described in Fig. 3.
  • Fig. 3 is a block diagram of an embodiment of a quality controller for use in a radio frequency receiving and processing system according to the invention.
  • Fig. 3 is a block diagram of the quality controller 52.
  • the quality controller 52 carries out an estimation of the average power of the input signal of the demodulator 50 of Fig. 2 by passing the input signal 62 representing at least one input signal in the block 64 and filtering the passed signal by the low-pass filter 66.
  • the output signal 68 of the quality controller in Fig. 3 is identical to the output signal 60 of Fig. 2.
  • the quality controller can make use of other input signals such as the output signals 54, 56, 58 of the demodulator. This may be the case, if the audio signal of a FM demodulator comprises high frequency components above the wanted audio frequencies this may serve as an indication of multi-path propagation.
  • the invention relates to a system and method for receiving radio frequency signals.
  • the system comprises a plurality of front-end receiving units, a processing unit, and a bus system coupling the front-end receiving units to the processing unit.
  • the front-end receiving units are coupled to antennas for receiving radio frequency signals and are arranged for demodulating and digitizing the received radio frequency signals to digitized demodulated signals.
  • the front-end receiving units are arranged for transmitting the digitized demodulated signals to the processing unit.
  • the processing unit is arranged to generate an output signal either in dependence on a combination of the digitized demodulated signals or in dependence on a selected digitized demodulated signal.
  • the digitized demodulated signal with the best quality signal is selected.
  • the front-end receiving units are arranged to generate the quality signal in dependence of the received RF- signal, while the processing unit is arranged to select the front-end receiving unit, providing the quality signal representing the radio-frequency signal with the best quality, to transmit the digitized intermediate signal.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)

Abstract

Cette invention concerne un système et un procédé de réception de signaux radiofréquences. Ce système comprend une pluralité d'unités de réception frontales, une unité de traitement et un système à bus couplant les unités de réception frontales à l'unité de traitement. Ces unités de réception frontales sont couplées à des antennes recevant des signaux radiofréquences et sont conçues pour démoduler et numériser les signaux radiofréquences reçus en signaux démodulés numérisés. En outre, les unités de réception frontales sont conçues pour transmettre les signaux démodulés numérisés à l'unité de traitement. L'unité de traitement est conçue pour générer un signal de sortie soit en fonction d'une combinaison des signaux démodulés numérisés, soit en fonction d'un signal démodulé numérisé sélectionné. On sélectionne de préférence le signal démodulé numérisé comportant le meilleur signal de qualité. Pour ce faire, les unités de réception frontales sont conçues pour générer le signal de qualité en fonction du signal radiofréquence reçu et l'unité de traitement est conçue pour sélectionner l'unité de réception frontale, attribuant au signal de qualité représentant le signal radiofréquence la meilleure qualité, de telle sorte que le signal intermédiaire numérisé soit transmis.
PCT/IB2003/002400 2002-05-30 2003-05-27 Systeme de reception et de traitement de frequences radio Ceased WO2003103161A2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2003241092A AU2003241092A1 (en) 2002-05-30 2003-05-27 Radio frequency receiving and processing system

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP02077137 2002-05-30
EP02077137.4 2002-05-30

Publications (2)

Publication Number Publication Date
WO2003103161A2 true WO2003103161A2 (fr) 2003-12-11
WO2003103161A3 WO2003103161A3 (fr) 2004-03-25

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PCT/IB2003/002400 Ceased WO2003103161A2 (fr) 2002-05-30 2003-05-27 Systeme de reception et de traitement de frequences radio

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AU (1) AU2003241092A1 (fr)
WO (1) WO2003103161A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1990923A3 (fr) * 2007-05-11 2011-05-11 Robert Bosch Gmbh Dispositif de réception

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5402451A (en) * 1993-01-11 1995-03-28 Hughes Aircraft Company Digital post-detection FM spatial diversity combination circuit
US5644599A (en) * 1994-11-25 1997-07-01 Motorola, Inc. Multisite digital radio communication system with signal diversity
JPH11301377A (ja) * 1998-04-24 1999-11-02 Harada Ind Co Ltd 自動車用受信制御システム
US7164704B1 (en) * 1999-12-09 2007-01-16 Texas Instruments Incorporated Beam forming for transmit using bluetooth modified hopping sequences (BFTBMH)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1990923A3 (fr) * 2007-05-11 2011-05-11 Robert Bosch Gmbh Dispositif de réception

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WO2003103161A3 (fr) 2004-03-25
AU2003241092A1 (en) 2003-12-19
AU2003241092A8 (en) 2003-12-19

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