WO2019128167A1 - Procédé et dispositif d'égalisation frontale numérique - Google Patents

Procédé et dispositif d'égalisation frontale numérique Download PDF

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Publication number
WO2019128167A1
WO2019128167A1 PCT/CN2018/093410 CN2018093410W WO2019128167A1 WO 2019128167 A1 WO2019128167 A1 WO 2019128167A1 CN 2018093410 W CN2018093410 W CN 2018093410W WO 2019128167 A1 WO2019128167 A1 WO 2019128167A1
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WIPO (PCT)
Prior art keywords
equalization
frequency domain
sequence
channel
equalized
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Ceased
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PCT/CN2018/093410
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English (en)
Chinese (zh)
Inventor
姜成玉
刁穗东
刘重军
付杰尉
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.)
Comba Telecom Technology Guangzhou Ltd
Comba Telecom Systems Guangzhou Co Ltd
Tianjin Comba Telecom Systems Co Ltd
Comba Network Systems Co Ltd
Original Assignee
Comba Telecom Technology Guangzhou Ltd
Comba Telecom Systems China Ltd
Comba Telecom Systems Guangzhou Co Ltd
Tianjin Comba Telecom Systems Co Ltd
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Application filed by Comba Telecom Technology Guangzhou Ltd, Comba Telecom Systems China Ltd, Comba Telecom Systems Guangzhou Co Ltd, Tianjin Comba Telecom Systems Co Ltd filed Critical Comba Telecom Technology Guangzhou Ltd
Publication of WO2019128167A1 publication Critical patent/WO2019128167A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • 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
    • H04B7/0845—Weighted combining per branch equalization, e.g. by an FIR-filter or RAKE receiver per antenna branch
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03159—Arrangements for removing intersymbol interference operating in the frequency domain
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03891—Spatial equalizers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response

Definitions

  • Embodiments of the present invention relate to the field of communications, and in particular, to a method and apparatus for digital front end equalization.
  • the amplitude and phase characteristics of the RF channels in the RRU may be inconsistent.
  • the inconsistency between the channels may affect the performance of the smart antenna, which may affect the beam shaping of the antenna.
  • channel equalization techniques must be used to compensate for the amplitude and phase errors of the RF channel.
  • the purpose of the channel equalization technique is to adjust the amplitude phase of all RF channels of the RRU to the same amplitude phase.
  • the prior art uses the equalization sequence of any RF channel of the RRU as a reference channel, and equalizes the amplitude and phase of the remaining channels to the amplitude and phase of the reference channel.
  • this technique amplitude equalization brings uncertainty and channel equalization.
  • the performance is very relevant to the choice of the reference channel. For example, if the amplitude of the reference RF channel is too large, the channel equalization technique will increase the amplitude of all channels to be equalized, affecting system performance.
  • the present invention provides a method and apparatus for digital front end equalization to eliminate the influence of channel equalization on system performance, thereby improving system performance.
  • Embodiments of the present invention provide a method for digital front end equalization, including:
  • the equalization sequence is an uplink equalization sequence
  • Determining, according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency domain equalization sequence, the frequency domain response of the to-be-equalized channel including:
  • the A frequency domain equalization sequence of the channel to be equalized is equalized.
  • the equalization sequence is a downlink equalization sequence
  • Determining, according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency domain equalization sequence, the frequency domain response of the to-be-equalized channel including:
  • the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence
  • the method further includes:
  • the obtaining the average power of the effective downlink equalization sequence in the downlink equalization sequence according to the downlink frequency domain equalization sequence includes:
  • the frequency domain response of the channel to be equalized including:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel
  • the Am ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.
  • the determining, according to the average power of the effective downlink equalization sequence and the average amplitude of the to-be-equalized channel, the gain adjustment factor of the to-be-equalized channel including:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel.
  • the embodiment of the invention further provides a device for digital front end equalization, comprising:
  • a reading module configured to read an equalization sequence received by the receiving end of the equalization sequence
  • a transforming module configured to perform frequency domain transform on the equalized sequence of the read equalized channel and the pre-stored reference equalized sequence, respectively, to obtain a frequency domain equalized sequence and a reference frequency domain equalized sequence of the to-equalized channel;
  • a determining module configured to determine a frequency domain response of the to-be-equalized channel according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence;
  • an equalization module configured to determine, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel, and to perform equalization processing on the to-be-equalized channel according to the equalization coefficient.
  • the equalization sequence is an uplink equalization sequence
  • the determining module is specifically configured to:
  • the A frequency domain equalization sequence of the channel to be equalized is equalized.
  • the equalization sequence is a downlink equalization sequence; the determining module is specifically configured to:
  • the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence
  • the method further includes: a gain module
  • the gain module is configured to determine a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel;
  • the determining module is specifically configured to:
  • the determining module is specifically configured to:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel
  • the Am ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.
  • the gain module is specifically configured to:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel.
  • Another embodiment of the present invention provides a computing device including a memory and a processor, wherein the memory is configured to store program instructions, and the processor is configured to invoke program instructions stored in the memory according to the obtained program. Perform any of the above methods.
  • Another embodiment of the present invention provides a computer readable storage medium storing computer executable instructions for causing the computer to perform any of the methods described above.
  • Embodiments of the present invention provide a computer program product that, when run on a computer, causes the computer to perform any of the methods described above.
  • the digital front-end equalization method includes: reading an equalization sequence received by the receiver of the equalization sequence; performing frequency domain transformation on the equalized sequence of the read channel to be equalized and the pre-stored reference equalization sequence, respectively a frequency domain equalization sequence and a reference frequency domain equalization sequence of the channel to be equalized; determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence of the channel to be equalized and the reference frequency domain equalization sequence; The domain response determines an equalization coefficient corresponding to the to-be-equalized channel; and the equalization channel is equalized according to the equalization coefficient.
  • the frequency domain transform is performed on the equalized sequence of the read channel to be equalized and the pre-stored reference sequence respectively, and the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized are obtained;
  • the frequency domain response of the channel to be equalized is determined according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, and the equalization coefficient corresponding to the channel to be equalized is determined according to the frequency domain response; finally, the equalization channel is equalized according to the equalization coefficient.
  • the equalization sequence of any channel as a reference sequence it is not affected by the reference channel, which can eliminate the impact of channel equalization on system performance and improve system performance.
  • FIG. 1 is a schematic flowchart of a method for digital front end equalization according to an embodiment of the present invention
  • FIG. 2 is a schematic diagram of an uplink structure of an RRU according to an embodiment of the present invention.
  • FIG. 3 is a schematic flowchart of a method for digital front end equalization according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for determining an average amplitude of a downlink equalization sequence according to an embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for determining an average amplitude of a downlink reference sequence according to an embodiment of the present disclosure
  • FIG. 6 is a schematic diagram of a downlink structure of an RRU according to an embodiment of the present disclosure.
  • FIG. 7 is a schematic structural diagram of a digital front end equalization apparatus according to an embodiment of the present invention.
  • FIG. 8 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
  • the i-equalization channel is frequently used in the description, and the i-equalized channel refers to any equalization channel in the antenna.
  • FIG. 1 is a schematic flowchart diagram of a method for digital front-end equalization according to an embodiment of the present invention. As shown in FIG. 1 , the method may include:
  • the equalization sequence received by the receiving end of the equalization sequence may refer to reading the equalization sequence received by the receiving end of the equalization sequence in the RRU.
  • the equalization sequence of the channel to be equalized in the step S102 may refer to the equalization sequence of the radio channel to be equalized.
  • the equalization sequence is an uplink equalization sequence
  • determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized and referring to the channel to be equalized
  • the uplink frequency domain equalization sequence and the reference frequency domain equalization sequence determine the uplink frequency domain response of the channel to be equalized.
  • the uplink frequency domain response may be subjected to IDFT (Inverse Discrete Fourier Transform) to obtain uplink equalization filtering. And then writing the uplink equalization filter coefficients into the corresponding uplink equalization filter to make the uplink equalization filter coefficients take effect.
  • IDFT Inverse Discrete Fourier Transform
  • the frequency domain response of the uplink equalization of the channel to be equalized may be determined according to the following formula 1.
  • FIG. 2 exemplarily shows a schematic structural diagram of an RRU to which the embodiment of the present invention is applied.
  • the method includes: multiple radio frequency transceivers, multiple equalization filters, equalization channels, and multiple ADCs (Analog-to- Digital Converter, analog to digital converter), multiple low noise amplifiers, coupling discs.
  • ADCs Analog-to- Digital Converter, analog to digital converter
  • the equalization sequence when the equalization sequence is an uplink equalization sequence, two equalization sequences and a reference equalization sequence having the same length and content may be locally generated in advance, and then For any equalization channel, the equalization sequence is sent to the RF transceiver through the equalization channel, the coupling disc, the low noise amplifier, and the equalization filter, and the reference sequence is stored locally.
  • the equalization sequence is the downlink equalization sequence
  • the method flow shown in FIG. 3 may be used to determine the channel to be equalized. Frequency domain response.
  • S303 Determine a frequency domain response of the channel to be equalized according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the channel to be equalized, and the average power of the effective downlink equalization sequence and the average amplitude of the channel to be equalized.
  • the average power of the downlink frequency domain equalization sequence and the downlink frequency domain equalization sequence may be obtained according to the downlink frequency domain equalization sequence.
  • the average power of the noise; then, the average power of the effective downlink equalization sequence in the downlink equalization sequence is obtained according to the average power of the downlink frequency domain equalization sequence and the average power of the noise.
  • step S303 when determining the frequency domain response of the channel to be equalized according to the downlink frequency domain equalization sequence and the reference frequency domain equalization sequence corresponding to the channel to be equalized, and the average power of the effective downlink equalization sequence and the average amplitude of the channel to be equalized,
  • the frequency domain response of the downlink equalization of the channel to be equalized can be determined according to the following formula 2
  • Am ref is the average amplitude of the reference frequency domain equalization sequence
  • Am i is the average amplitude of the channel to be equalized
  • Am ref is the average power and noise according to the downlink frequency domain equalization sequence. The average power, the average power of the effective downlink equalization sequence, and the average amplitude of the channel to be equalized are obtained.
  • the average amplitude Am i of the downlink equalization sequence of the channel to be equalized can be determined by the method flow shown in FIG. 4 .
  • the average power of the downlink frequency domain equalization sequence may be determined according to the following formula 3.
  • the noise average power of the downlink frequency domain equalization sequence may be determined according to the following formula 4.
  • the value of the discrete Fourier operation of the downlink frequency-domain equalization sequence of the i-th to be equalized channel is f
  • N is the length of the downlink reference sequence
  • N RE is the current bandwidth resource element number
  • Powern i is the i-th waiting The average noise power of the downlink frequency domain equalization sequence of the equalization channel.
  • S402. Determine an effective average power of the downlink frequency domain equalization sequence according to an average power of the downlink frequency domain equalization sequence and a noise power of the downlink frequency domain equalization sequence.
  • the downlink frequency domain equalization sequence may be determined according to the following formula 5. Effective average power.
  • the average power of the downlink frequency domain equalization formula fifth sequence P i is the i th channel to be equalized, Powern i is the i-th frequency channel to be equalized downlink average power of the noise domain equalization sequence, PowerS i is the i th channel to be equalized The effective average power of the downlink frequency domain equalization sequence.
  • S403. Determine an average amplitude of a downlink frequency domain equalization sequence of the to-be-equalized channel according to an effective average power of the downlink frequency domain equalization sequence.
  • the average amplitude of the downlink equalization sequence may be determined according to the following formula 6.
  • PowerS i is the effective average power of the downlink frequency-domain equalization sequence of the i-th to be equalized channel
  • Am i is the average amplitude of the downlink frequency-domain equalization sequence of the i-th to be equalized channel.
  • step S402 determining the effective average power of the downlink frequency domain equalization sequence according to the average power of the downlink frequency domain equalization sequence and the noise power of the downlink frequency domain equalization sequence, in order to reduce the calculation amount,
  • the following formula 7 directly determines the effective average power of the downlink frequency domain equalization sequence.
  • Equation 7 The value of the discrete Fourier operation of the downlink frequency-domain equalization sequence of the i-th to be equalized channel is f, N is the length of the downlink reference sequence, N RE is the current bandwidth resource element number, and PowerS i is the i-th waiting The effective average power of the downlink frequency domain equalization sequence of the equalization channel.
  • the average amplitude of the downlink equalization sequence of the channel to be equalized is determined by using the above formula 6.
  • the average amplitude Am ref of the reference sequence can be determined by the method flow shown in FIG. 5.
  • the average power of the downlink frequency domain reference sequence may be determined according to the following formula 10.
  • Equation 8 The value of the discrete Fourier operation with a value of f in the frequency domain reference sequence, N is the length of the reference sequence, and P ref is the average power of the frequency domain reference sequence.
  • the noise average power of the frequency domain reference sequence may be determined according to the following formula 9.
  • N is the length of the reference sequence
  • N RE is the current bandwidth resource element number
  • Powern ref is the noise average power of the frequency domain reference sequence.
  • S502. Determine an effective average power of the frequency domain reference sequence according to the average power of the frequency domain reference sequence and the noise power of the frequency domain reference sequence.
  • the downlink frequency domain reference sequence may be determined according to the following formula Effective average power.
  • P ref is the average power of the frequency domain reference sequence
  • Powern ref is the noise average power of the frequency domain reference sequence
  • PowerS ref is the effective average power of the frequency domain reference sequence
  • the average amplitude of the reference sequence may be determined according to the following formula 11.
  • PowerS ref is the effective average power of the frequency domain reference sequence
  • Am ref is the average amplitude of the reference sequence
  • the effective average power of the frequency domain reference sequence is determined according to the average power of the frequency domain reference sequence and the noise power of the frequency domain reference sequence.
  • the following formula may also be directly used according to the following formula. Twelve directly determines the effective average power of the frequency domain reference sequence.
  • the average amplitude of the reference sequence of the channel to be equalized is determined by using Equation 11 above.
  • the equalization channel is further adjusted in gain, and when the equalization channel is subjected to gain adjustment, the average amplitude Am i and the reference sequence according to the downlink equalization sequence may be used.
  • the average amplitude Am ref determines the downlink gain adjustment factor of the channel to be equalized, and then writes the downlink gain adjustment factor into the gain block to perform gain adjustment on the equalization channel.
  • the downlink gain adjustment factor GAIN of the channel to be equalized can be determined according to the following formula thirteen.
  • Am ref is the average amplitude of the reference frequency domain equalization sequence
  • Am i is the average amplitude of the channel to be equalized.
  • the method shown in FIG. 3 can be applied to the RRU shown in FIG. 6.
  • the method includes: multiple radio transceivers, multiple equalization filters, and multiple clipping peaks.
  • Module multiple digital predistortion modules, multiple gain modules, multiple DACs (Digital-to-Analog Converter), multiple power amplifier modules, equalization channels, and coupling pads.
  • DACs Digital-to-Analog Converter
  • equalization channels equalization channels
  • coupling pads can also be applied to RRUs of other structures.
  • the frequency domain transform is performed on the equalized sequence of the read channel to be equalized and the pre-stored reference sequence respectively, and the frequency domain equalization sequence and the reference frequency domain equalization of the channel to be equalized are obtained. a sequence; then determining a frequency domain response of the channel to be equalized according to the frequency domain equalization sequence and the reference frequency domain equalization sequence of the channel to be equalized, and determining an equalization coefficient corresponding to the channel to be equalized according to the frequency domain response; and finally performing the equalization channel according to the equalization coefficient Balance processing.
  • the equalization sequence of any channel is not affected by the reference channel, which can eliminate the impact of channel equalization on system performance and improve system performance.
  • the embodiment of the present invention further provides a device for digital front-end equalization. As shown in FIG. 7, the device includes:
  • the reading module 701 is configured to read an equalization sequence received by the receiving end of the equalization sequence
  • the transforming module 702 is configured to perform frequency domain transform on the equalized sequence of the read equalized channel and the pre-stored reference equalized sequence, respectively, to obtain a frequency domain equalized sequence and a reference frequency domain equalized sequence of the to-be-equalized channel;
  • a determining module 703 configured to determine a frequency domain response of the to-be-equalized channel according to the frequency domain equalization sequence of the to-be-equalized channel and the reference frequency-domain equalization sequence;
  • the equalization module 704 is configured to determine, according to the frequency domain response, an equalization coefficient corresponding to the to-be-equalized channel, and perform equalization processing on the to-be-equalized channel according to the equalization coefficient.
  • the equalization sequence is an uplink equalization sequence; and the determining module 703 is specifically configured to:
  • the A frequency domain equalization sequence of the channel to be equalized is equalized.
  • the equalization sequence is a downlink equalization sequence; and the determining module 703 is specifically configured to:
  • the downlink frequency domain equalization sequence is a frequency domain equalization sequence obtained by the frequency domain transformation of the downlink equalization sequence
  • the method further includes: a gain module 705;
  • the gain module 705 is configured to determine a gain adjustment factor of the to-be-equalized channel according to an average power of the effective downlink equalization sequence and an average amplitude of the to-be-equalized channel;
  • the determining module 703 is specifically configured to:
  • the determining module 703 is specifically configured to:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel
  • the Am ref is based on The average power of the downlink frequency domain equalization sequence, the average power of the noise, the average power of the effective downlink equalization sequence, and the average amplitude of the to-equalization channel are obtained.
  • the gain module 705 is specifically configured to:
  • the Am ref is an average amplitude of the reference frequency domain equalization sequence
  • the Am i is an average amplitude of the to-be-equalized channel.
  • FIG. 8 is a schematic structural diagram of a computing device according to an embodiment of the present invention.
  • the computing device may include a central processing unit (CPU), a memory 802, an input/output device 803, a bus 804, and the like.
  • the input device may include a keyboard, a mouse, a touch screen, etc.
  • the output device 4 may include a display device such as a liquid crystal display (LCD), a cathode ray tube (CRT), or the like.
  • LCD liquid crystal display
  • CRT cathode ray tube
  • Memory 802 can include read only memory (ROM) and random access memory (RAM) and provides program instructions and data stored in the memory to the processor.
  • ROM read only memory
  • RAM random access memory
  • the memory may be used to store a program of the method provided by any embodiment of the present invention, and the processor executes the method disclosed in any one of the embodiments according to the obtained program instruction by calling a program instruction stored in the memory. .
  • an embodiment of the present invention further provides a computer readable storage medium for storing computer program instructions for use in the above computing device, comprising a program for executing the method disclosed in any of the above embodiments.
  • the computer storage medium can be any available media or data storage device accessible by a computer, including but not limited to magnetic storage (eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.), optical storage (eg, CD, DVD, BD, HVD, etc.), and semiconductor memories (for example, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).
  • magnetic storage eg, floppy disk, hard disk, magnetic tape, magneto-optical disk (MO), etc.
  • optical storage eg, CD, DVD, BD, HVD, etc.
  • semiconductor memories for example, ROM, EPROM, EEPROM, non-volatile memory (NAND FLASH), solid-state hard disk (SSD)).
  • an embodiment of the present invention further provides a computer program product, which when executed on a computer, causes the computer to perform the method disclosed in any of the above embodiments.
  • the reference sequence and the equalization sequence are selected instead of using the equalization sequence of any channel as the reference sequence, so it is not affected by the reference channel. This eliminates the impact of channel equalization on system performance, which in turn improves system performance.
  • embodiments of the present invention can be provided as a method, or a computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.
  • the computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device.
  • the apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.
  • These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device.
  • the instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

La présente invention concerne, selon des modes de réalisation, le domaine technique des communications, et en particulier, un dispositif et un procédé d'égalisation frontale numérique. Le procédé comprend : la lecture d'une séquence d'égalisation reçue par une extrémité de réception de séquence d'égalisation ; la réalisation d'une transformation de domaine fréquentiel sur la séquence d'égalisation lue d'un canal qui subit une égalisation et une séquence d'égalisation de référence préstockée, de façon à obtenir une séquence d'égalisation de domaine fréquentiel du canal qui subit une égalisation et une séquence d'égalisation de domaine fréquentiel de référence, respectivement ; la détermination d'une réponse de domaine fréquentiel du canal qui subit une égalisation sur la base de la séquence d'égalisation de domaine fréquentiel du canal qui subit une égalisation et de la séquence d'égalisation de domaine de fréquence de référence ; la détermination, selon la réponse de domaine fréquentiel, d'un coefficient d'égalisation qui correspond au canal qui subit une égalisation ; et la réalisation d'un traitement d'égalisation sur le canal qui subit une égalisation selon le coefficient d'égalisation. Le procédé sélectionne une séquence d'égalisation et une séquence de référence préstockée au lieu d'utiliser une séquence d'égalisation d'un quelconque canal en tant que séquence de référence. Par conséquent, le procédé n'est pas affecté par le canal de référence, et élimine ainsi l'effet d'égalisation de canal sur des performances de système, améliorant ainsi les performances du système.
PCT/CN2018/093410 2017-12-29 2018-06-28 Procédé et dispositif d'égalisation frontale numérique Ceased WO2019128167A1 (fr)

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CN108111445B (zh) * 2017-12-29 2020-01-14 京信通信系统（中国）有限公司 一种数字前端均衡的方法和装置
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