BR9712722A - Digital receiver for multiport signals, and, process to estimate a channel's frequency response. - Google Patents

Digital receiver for multiport signals, and, process to estimate a channel's frequency response.

Info

Publication number
BR9712722A
BR9712722A BR9712722-1A BR9712722A BR9712722A BR 9712722 A BR9712722 A BR 9712722A BR 9712722 A BR9712722 A BR 9712722A BR 9712722 A BR9712722 A BR 9712722A
Authority
BR
Brazil
Prior art keywords
digital receiver
channel
signals
frequency response
transmitted
Prior art date
Application number
BR9712722-1A
Other languages
Portuguese (pt)
Inventor
Dawood Alam
Matthew James Collins
David Huw Davies
Peter Anthony Keevill
John Matthew Nolan
Thomas Foxcroft
Jonathan Parker
Original Assignee
Discovision Ass
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 GBGB9622728.5A external-priority patent/GB9622728D0/en
Application filed by Discovision Ass filed Critical Discovision Ass
Publication of BR9712722A publication Critical patent/BR9712722A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0057—Block codes
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
    • 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
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0214—Channel estimation of impulse response of a single coefficient
    • 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
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H04L25/0232—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols by interpolation between sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2649—Demodulators
    • H04L27/26524—Fast Fourier transform [FFT] or discrete Fourier transform [DFT] demodulators in combination with other circuits for demodulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2657—Carrier synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H04L27/2655—Synchronisation arrangements
    • H04L27/2662—Symbol synchronisation
    • H04L27/2665—Fine synchronisation, e.g. by positioning the FFT window
    • 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
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0064—Concatenated codes
    • H04L1/0065—Serial concatenated codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Discrete Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Power Engineering (AREA)
  • Artificial Intelligence (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Error Detection And Correction (AREA)
  • Stereo-Broadcasting Methods (AREA)
  • Superheterodyne Receivers (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
  • Complex Calculations (AREA)

Abstract

"RECEPTOR DIGITAL PARA SINAIS DE MULTIPORTADORA, E, PROCESSO PARA ESTIMAR UMA RESPOSTA DE FREQœêNCIA DE UM CANAL". A invenção provê uma implementação de "chip" único de um receptor digital para sinais de multiportadora que são transmitidos por multiplexação por divisão de freq³ência ortogonal. Circuitos de estimativa de canal e correção melhorados são providos. O receptor possui circuito de controle de freq³ência e controle de taxa de amostragem altamente preciso. A decodificação BCH das portadoras de dados tps é obtida com recursos mínimos, com um arranjo que inlclui um pequeno multiplicador de campo Galois. Um circuito de sincronização de janela FFT melhorado é acoplado ao circuito de reamostragem para localizar a fronteira do intervalo de guarda transmitido com a estrutura ativa do sinal. Um processador FFT direcionado, de tempo real, é associado operacionalmente ao circuito de sincronização de janela FFT e opera com exigências de memórias reduzidas."DIGITAL RECEIVER FOR MULTIPORTER SIGNALS, AND, PROCESS FOR ESTIMATING A FREQUENCY RESPONSE OF A CHANNEL". The invention provides a single-chip implementation of a digital receiver for multicarrier signals that are transmitted by orthogonal frequency division multiplexing. Improved channel estimation and correction circuits are provided. The receiver features highly accurate frequency control circuitry and sample rate control. BCH decoding of tps data carriers is achieved with minimal resources, with an arrangement that includes a small Galois field multiplier. An improved FFT window synchronization circuit is coupled to the resampling circuit to locate the transmitted guard interval boundary with the active frame of the signal. A real-time, directed FFT processor is operationally associated with the FFT window synchronization circuit and operates with reduced memory requirements.

BR9712722-1A 1996-10-31 1997-10-22 Digital receiver for multiport signals, and, process to estimate a channel's frequency response. BR9712722A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GBGB9622728.5A GB9622728D0 (en) 1996-10-31 1996-10-31 Timing synchronization in a reciever employing orthogonal frequency division mutiplexing
GB9720550A GB2318953A (en) 1996-10-31 1997-09-26 OFDM receiver with FFT window sync.
PCT/US1997/018911 WO1998019410A2 (en) 1996-10-31 1997-10-22 Single chip vlsi implementation of a digital receiver employing orthogonal frequency division multiplexing

Publications (1)

Publication Number Publication Date
BR9712722A true BR9712722A (en) 1999-10-26

Family

ID=26310320

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9712722-1A BR9712722A (en) 1996-10-31 1997-10-22 Digital receiver for multiport signals, and, process to estimate a channel's frequency response.

Country Status (9)

Country Link
EP (1) EP0938795A2 (en)
JP (2) JP2001527706A (en)
KR (1) KR20000052956A (en)
CN (1) CN1249099A (en)
AU (1) AU727726B2 (en)
BR (1) BR9712722A (en)
CA (1) CA2270149A1 (en)
IL (1) IL129655A0 (en)
WO (1) WO1998019410A2 (en)

Families Citing this family (39)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6292511B1 (en) * 1998-10-02 2001-09-18 Usa Digital Radio Partners, Lp Method for equalization of complementary carriers in an AM compatible digital audio broadcast system
US6940933B1 (en) 1999-06-23 2005-09-06 Cingular Wireless Ii, Llc Apparatus and method for synchronization in a multiple-carrier communications system by observing a phase-frequency relationship of a plurality of pilot signals
US6930995B1 (en) * 1999-06-23 2005-08-16 Cingular Wireless Ii, Llc Apparatus and method for synchronization in a multiple-carrier communication system by observing a plurality of synchronization indicators
US6389087B1 (en) 1999-06-23 2002-05-14 At&T Wireless Services, Inc. Apparatus and method for synchronization in a multiple-carrier communication system by observing energy within a guard band
KR100778605B1 (en) * 2000-03-30 2007-11-22 콸콤 인코포레이티드 Method and apparatus for a mobile station application to identify specified events
EP1178640B1 (en) 2000-08-01 2006-05-24 Sony Deutschland GmbH Device and method for channel estimating an OFDM system
JP3960511B2 (en) * 2001-05-07 2007-08-15 日本放送協会 OFDM signal analyzer
EP1267536A1 (en) 2001-06-13 2002-12-18 Conexant Systems, Inc. Multicarrier receiver with detection of the transmission mode and length of the guard interval
EP1283614A1 (en) * 2001-08-10 2003-02-12 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Channel estimation in a multicarrier transmit diversity system
FR2830389B1 (en) * 2001-10-03 2004-09-24 Canon Kk METHOD AND DEVICE COMBINING CHANNEL ESTIMATION AND TIME SYNCHRONIZATION FOR RECEPTION
US7548506B2 (en) 2001-10-17 2009-06-16 Nortel Networks Limited System access and synchronization methods for MIMO OFDM communications systems and physical layer packet and preamble design
KR100429528B1 (en) * 2002-01-23 2004-05-03 삼성전자주식회사 Method and apparatus for digital communications
US7224666B2 (en) 2002-05-13 2007-05-29 Texas Instruments Incorporated Estimating frequency offsets using pilot tones in an OFDM system
EP1408665B1 (en) 2002-10-10 2017-09-06 Panasonic Intellectual Property Management Co., Ltd. Detection of the position of pilot symbols in a multicarrier signal
DE102004047600A1 (en) * 2004-09-30 2006-04-13 Robert Bosch Gmbh Method for synchronizing a sampling clock and synchronization unit for a multi-carrier receiving system
KR100686140B1 (en) * 2005-01-18 2007-02-23 엘지전자 주식회사 Tracker Lock Generation Method
JP2006287756A (en) 2005-04-01 2006-10-19 Ntt Docomo Inc Transmitting apparatus, transmitting method, receiving apparatus, and receiving method
CN101110803B (en) * 2006-07-18 2011-06-01 大唐移动通信设备有限公司 Method for implementing join operation based on fast Fourier transformation and inverse transformation
US8238436B2 (en) * 2007-03-30 2012-08-07 Mediatek Inc. Methods and device for fast acquisition of digital video signals
CN101552756B (en) * 2008-04-03 2013-06-12 联咏科技股份有限公司 Orthogonal frequency division multiplexing modulated receiving device and filter used by same
CN101257472B (en) * 2008-04-09 2011-04-27 浙江大学 Orthogonal frequency division multiplexing receiver system and its automatic gain control method
CN102282900B (en) * 2008-11-12 2015-01-07 新加坡科技研究局 A multiple access communication system
CN101626250A (en) * 2009-07-23 2010-01-13 无锡圆芯微电子有限公司 Method for realizing integrate circuit of Reed-Solomon decoder having single error correcting capability
EP2494753A2 (en) 2009-10-30 2012-09-05 Bangor University Synchronisation process in optical frequency division multiplexing transmission systems
GB2489922A (en) 2011-04-06 2012-10-17 Univ Bangor Synchronising optical OFDM signal with pattern of DC offset levels superimposed upon OFDM symbols
KR20160026749A (en) * 2014-08-28 2016-03-09 뉴라컴 인코포레이티드 Frame transmitting method and frame receiving method
US10003986B2 (en) * 2014-09-26 2018-06-19 Futurewei Technologies, Inc. Device, network, and method for communications with variable-duration reference signals
FR3038084B1 (en) * 2015-06-29 2017-12-29 Centre National De La Recherche Scient (C N R S) STOCHASTIC PARALLEL MICROPROCESSOR
CN107454030B (en) * 2017-07-17 2020-03-17 科大智能电气技术有限公司 Power line broadband carrier semi-parallel transmitter and implementation method thereof
CN109391580B (en) * 2017-08-04 2021-06-15 安立股份有限公司 Synchronization device and synchronization method
CN110830086B (en) * 2018-08-07 2021-06-22 航天信息股份有限公司 Signal processing device and reader
CN109286381B (en) * 2018-09-12 2022-03-08 西安微电子技术研究所 Automatic gain control circuit based on thermometer coding and control method
CN111371717B (en) * 2018-12-26 2022-08-05 深圳市力合微电子股份有限公司 Method for carrying out phase tracking by using symmetric pilot frequency in OFDM modulation
CN112202457A (en) * 2019-07-08 2021-01-08 得琦电子股份有限公司 Channel menu interface of wireless audio transmission system capable of quickly selecting channel
CN112099339B (en) * 2020-07-27 2021-08-24 季华实验室 UTC data receiver and timer
CN112231847B (en) * 2020-11-04 2024-04-02 中国商用飞机有限责任公司北京民用飞机技术研究中心 Transition position determining method and device, electronic equipment and storage medium
CN112787723B (en) * 2020-12-29 2022-03-25 武汉邮电科学研究院有限公司 Nonlinear encoder, encoding method and optical transmission system
CN112818633B (en) * 2021-04-20 2021-07-20 北京智芯仿真科技有限公司 Iterative method and device for integrated circuit current distribution dynamically applied by interlayer coupling
CN116153362B (en) * 2023-04-20 2023-08-25 浙江力积存储科技有限公司 Delay feedback method and delay feedback storage structure for read latency counter

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4300229A (en) * 1979-02-21 1981-11-10 Nippon Electric Co., Ltd. Transmitter and receiver for an othogonally multiplexed QAM signal of a sampling rate N times that of PAM signals, comprising an N/2-point offset fourier transform processor
SE9302453L (en) * 1993-07-20 1994-10-17 Telia Ab Method and apparatus for synchronization in digital transmission system of type OFDM
JP3074103B2 (en) * 1993-11-16 2000-08-07 株式会社東芝 OFDM synchronous demodulation circuit
FI96372C (en) * 1994-06-16 1996-06-10 Nokia Technology Gmbh Frame synchronization on a device receiving digital radio broadcasts
US5774450A (en) * 1995-01-10 1998-06-30 Matsushita Electric Industrial Co., Ltd. Method of transmitting orthogonal frequency division multiplexing signal and receiver thereof
JP2986921B2 (en) * 1995-02-06 1999-12-06 エーディーシー テレコミュニケーションズ，インコーポレイティド Multipoint-to-point communication system
SE514986C2 (en) * 1995-03-01 2001-05-28 Telia Ab Method and device for synchronization with OFDM systems

Also Published As

Publication number Publication date
CA2270149A1 (en) 1998-05-07
WO1998019410A2 (en) 1998-05-07
EP0938795A2 (en) 1999-09-01
AU727726B2 (en) 2000-12-21
IL129655A0 (en) 2000-02-29
WO1998019410A3 (en) 1998-08-27
JP2005045788A (en) 2005-02-17
CN1249099A (en) 2000-03-29
JP2001527706A (en) 2001-12-25
KR20000052956A (en) 2000-08-25
AU5147198A (en) 1998-05-22

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Legal Events

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B08F Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette]

Free format text: REFERENTE A 8A E 9A ANUIDADES.

B08K Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette]

Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 1903 DE 26/06/2007.