BR9507904A - Receptor de comunicações digital processo para equalização de junta e combinação de diversidade em um receptor de comunicações digital e sistema de comunicações digital - Google Patents

Receptor de comunicações digital processo para equalização de junta e combinação de diversidade em um receptor de comunicações digital e sistema de comunicações digital

Info

Publication number
BR9507904A
BR9507904A BR9507904A BR9507904A BR9507904A BR 9507904 A BR9507904 A BR 9507904A BR 9507904 A BR9507904 A BR 9507904A BR 9507904 A BR9507904 A BR 9507904A BR 9507904 A BR9507904 A BR 9507904A
Authority
BR
Brazil
Prior art keywords
digital communications
communications receiver
diversity
combination
joint equalization
Prior art date
Application number
BR9507904A
Other languages
English (en)
Inventor
Gregory E Bottomley
Original Assignee
Ericsson Ge Mobile Inc
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
Application filed by Ericsson Ge Mobile Inc filed Critical Ericsson Ge Mobile Inc
Publication of BR9507904A publication Critical patent/BR9507904A/pt

Links

Classifications

    • 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
    • H04L1/02—Arrangements for detecting or preventing errors in the information received by diversity reception
    • H04L1/06—Arrangements for detecting or preventing errors in the information received by diversity reception using space 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
    • H04B7/0837—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
    • H04L25/03178—Arrangements involving sequence estimation techniques
    • H04L25/03248—Arrangements for operating in conjunction with other apparatus
    • 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
    • H04L25/0204—Channel estimation of multiple channels

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BR9507904A 1994-05-31 1995-05-26 Receptor de comunicações digital processo para equalização de junta e combinação de diversidade em um receptor de comunicações digital e sistema de comunicações digital BR9507904A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/251,202 US5499272A (en) 1994-05-31 1994-05-31 Diversity receiver for signals with multipath time dispersion
PCT/US1995/006801 WO1995033314A1 (en) 1994-05-31 1995-05-26 Diversity receiver for signals with multipath time dispersion

Publications (1)

Publication Number Publication Date
BR9507904A true BR9507904A (pt) 1997-09-16

Family

ID=22950922

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9507904A BR9507904A (pt) 1994-05-31 1995-05-26 Receptor de comunicações digital processo para equalização de junta e combinação de diversidade em um receptor de comunicações digital e sistema de comunicações digital

Country Status (9)

Country Link
US (1) US5499272A (pt)
EP (1) EP0763286A1 (pt)
JP (1) JPH10501387A (pt)
CN (1) CN1078410C (pt)
AU (1) AU2655895A (pt)
BR (1) BR9507904A (pt)
CA (1) CA2189121C (pt)
FI (1) FI964743A (pt)
WO (1) WO1995033314A1 (pt)

Families Citing this family (69)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5862192A (en) * 1991-12-31 1999-01-19 Lucent Technologies Inc. Methods and apparatus for equalization and decoding of digital communications channels using antenna diversity
US5572552A (en) * 1994-01-27 1996-11-05 Ericsson Ge Mobile Communications Inc. Method and system for demodulation of downlink CDMA signals
US6081566A (en) * 1994-08-02 2000-06-27 Ericsson, Inc. Method and apparatus for interference rejection with different beams, polarizations, and phase references
JP2689926B2 (ja) * 1994-12-05 1997-12-10 日本電気株式会社 ダイバーシティ受信機
US6240338B1 (en) 1995-08-22 2001-05-29 Micron Technology, Inc. Seed ROM for reciprocal computation
US5907555A (en) * 1995-10-18 1999-05-25 Telefonaktiebolaget Lm Ericsson Method for compensating for time dispersion in a communication system
US5787131A (en) * 1995-12-22 1998-07-28 Ericsson Inc. Method and apparatus for mitigation of self interference using array processing
US6038272A (en) * 1996-09-06 2000-03-14 Lucent Technologies Inc. Joint timing, frequency and weight acquisition for an adaptive array
US5838739A (en) * 1996-03-29 1998-11-17 Ericsson Inc. Channel estimator circuitry, and associated method, for a digital communication system
FR2750270B1 (fr) * 1996-06-21 1998-08-07 Alcatel Telspace Egaliseur-combineur pour recepteur en diversite, recepteur integrant un tel egaliseur-combineur, et procede de reception en diversite correspondant
FI103539B (fi) * 1996-07-03 1999-07-15 Nokia Telecommunications Oy Menetelmä samankanavasignaalien voimakkuuden määrittämiseksi ja vastaa notin
US5768307A (en) * 1996-09-13 1998-06-16 Telefonaktiebolaget Lm Ericsson Coherent demodulation with decision-directed channel estimation for digital communication
US5905757A (en) * 1996-10-04 1999-05-18 Motorola, Inc. Filter co-processor
US5883888A (en) * 1996-12-03 1999-03-16 Telefonaktiebolaget Lm Ericsson Seamless soft handoff in a CDMA cellular communications system
US6335954B1 (en) * 1996-12-27 2002-01-01 Ericsson Inc. Method and apparatus for joint synchronization of multiple receive channels
IL120222A0 (en) * 1997-02-14 1997-06-10 D S P C Israel Ltd Method and apparatus for acquiring and tracking the sampling phase of a signal
US6278752B1 (en) * 1997-05-02 2001-08-21 At&T Corporation System and method to prevent error propagation
CN1142635C (zh) * 1997-05-13 2004-03-17 夸尔柯姆股份有限公司 多副天线的检测和选择系统
US6333953B1 (en) * 1997-07-21 2001-12-25 Ericsson Inc. System and methods for selecting an appropriate detection technique in a radiocommunication system
US6185258B1 (en) * 1997-09-16 2001-02-06 At&T Wireless Services Inc. Transmitter diversity technique for wireless communications
DE29824762U1 (de) * 1997-09-16 2002-06-13 AT & T Wireless Services, Inc., Kirkland, Wash. Elektronische Schaltung für einen Sender für drahtlose Kommunikation
EP0960487B1 (en) 1997-10-31 2006-03-08 AT&T Wireless Services, Inc. Maximum likelihood detection of concatenated space-time codes for wireless applications with transmitter diversity
US6154507A (en) * 1997-12-22 2000-11-28 Ericsson Inc System and method for signal demodulation
US6188736B1 (en) * 1997-12-23 2001-02-13 At&T Wireless Svcs. Inc. Near-optimal low-complexity decoding of space-time codes for fixed wireless applications
US6130909A (en) * 1998-01-16 2000-10-10 Transamerica Business Credit Corporation Method and apparatus for equalization in a diversity receiver
US6792267B1 (en) * 1998-05-29 2004-09-14 Ericsson Inc. Systems and methods for uplinking downsampled radiotelephone signals from cellular radiotelephone base stations to a cellular radio exchange
JP2000078115A (ja) * 1998-08-27 2000-03-14 Mitsubishi Electric Corp ダイバーシチ受信機
US6459740B1 (en) * 1998-09-17 2002-10-01 At&T Wireless Services, Inc. Maximum ratio transmission
US6330271B1 (en) 1998-10-13 2001-12-11 Telefonaktiebolaget Lm Ericsson (Publ) CDMA receiver that shares a tracking device among multiple rake branches
US6574293B1 (en) 1998-10-28 2003-06-03 Ericsson Inc. Receivers and methods for reducing interference in radio communications
US6567475B1 (en) 1998-12-29 2003-05-20 Ericsson Inc. Method and system for the transmission, reception and processing of 4-level and 8-level signaling symbols
US7099410B1 (en) * 1999-01-26 2006-08-29 Ericsson Inc. Reduced complexity MLSE equalizer for M-ary modulated signals
US6567474B1 (en) 1999-03-02 2003-05-20 Phonex Corporation Digital wireless phone/modem jack capable of communications over the power lines using differential binary phase shift keying (DBPSK)
US6560299B1 (en) * 1999-07-30 2003-05-06 Christopher H Strolle Diversity receiver with joint signal processing
CA2279774A1 (en) 1999-08-09 2001-02-09 Dataradio Inc. Spatial diversity radio receiver
US6990160B1 (en) * 1999-09-17 2006-01-24 Matsushita Electric Industrial Co., Ltd. Reception apparatus and method
US7027536B1 (en) * 1999-10-08 2006-04-11 At&T Corp. Method and apparatus for designing finite-length multi-input multi-output channel shortening pre-filters
US6557096B1 (en) 1999-10-25 2003-04-29 Intel Corporation Processors with data typer and aligner selectively coupling data bits of data buses to adder and multiplier functional blocks to execute instructions with flexible data types
US6832306B1 (en) 1999-10-25 2004-12-14 Intel Corporation Method and apparatus for a unified RISC/DSP pipeline controller for both reduced instruction set computer (RISC) control instructions and digital signal processing (DSP) instructions
US6330660B1 (en) 1999-10-25 2001-12-11 Vxtel, Inc. Method and apparatus for saturated multiplication and accumulation in an application specific signal processor
SE516962C2 (sv) * 1999-11-25 2002-03-26 Ericsson Telefon Ab L M Digital kommunikationsmottagare med inbyggd styrenhet för in- och urkoppling av kanalföljare beroende av kommunikationskanalens kvalitet
US6804307B1 (en) 2000-01-27 2004-10-12 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for efficient transmit diversity using complex space-time block codes
US6732203B2 (en) 2000-01-31 2004-05-04 Intel Corporation Selectively multiplexing memory coupling global bus data bits to narrower functional unit coupling local bus
US7010029B1 (en) * 2000-04-13 2006-03-07 At&T Corp. Equalization of transmit diversity space-time coded signals
SE516846C2 (sv) * 2000-07-07 2002-03-12 Ericsson Telefon Ab L M Förfarande och anordning i ett radiokommunikationssystem
JP3845814B2 (ja) * 2000-08-10 2006-11-15 株式会社テルミナス・テクノロジー 連想メモリとその検索方法及びルータとネットワークシステム
US7003093B2 (en) * 2000-09-08 2006-02-21 Intel Corporation Tone detection for integrated telecommunications processing
US20020116186A1 (en) * 2000-09-09 2002-08-22 Adam Strauss Voice activity detector for integrated telecommunications processing
EP1327342B1 (de) * 2000-10-13 2012-12-12 IPCom GmbH & Co. KG Aus mehreren zeitlich zurückliegenden kanalschätzungen vorhergesagte kanalschätzung zur vorentzerrung
US6970520B1 (en) * 2000-11-13 2005-11-29 Telefonaktiebolaget Lm Ericsson (Publ) Methods and systems for accumulating metrics generated by a sequence estimation algorithm
US20020181407A1 (en) * 2001-03-28 2002-12-05 Anders Khullar Link quality control by using time dispersion information
US7197282B2 (en) * 2001-07-26 2007-03-27 Ericsson Inc. Mobile station loop-back signal processing
US7224942B2 (en) 2001-07-26 2007-05-29 Telefonaktiebolaget Lm Ericsson (Publ) Communications system employing non-polluting pilot codes
US6996380B2 (en) * 2001-07-26 2006-02-07 Ericsson Inc. Communication system employing transmit macro-diversity
US7209511B2 (en) * 2001-08-31 2007-04-24 Ericsson Inc. Interference cancellation in a CDMA receiving system
US20030045297A1 (en) * 2001-08-24 2003-03-06 Dent Paul W. Communication system employing channel estimation loop-back signals
US20030219113A1 (en) * 2002-05-21 2003-11-27 Bershad Neil J. Echo canceller with double-talk and channel impulse response adaptation
GB2392066B (en) * 2002-08-16 2005-11-09 Toshiba Res Europ Ltd Equaliser apparatus and methods
KR20040107035A (ko) * 2003-06-12 2004-12-20 삼성전자주식회사 디지털 방송 신호 수신기의 채널 추정 장치 및 그 방법
US7782987B2 (en) * 2004-03-12 2010-08-24 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for received signal quality estimation
US7643839B2 (en) * 2004-10-06 2010-01-05 Broadcom Corporation Method and system for diversity processing
US8340216B2 (en) * 2005-03-18 2012-12-25 Qualcomm Incorporated Space-time scrambling for cellular systems
US8218615B2 (en) 2005-03-29 2012-07-10 Qualcomm Incorporated Method and apparatus for block-wise decision-feedback equalization for wireless communication
US8615035B2 (en) 2005-03-29 2013-12-24 Qualcomm Incorporated Method and apparatus for block-wise decision-feedback equalization for wireless communication
US20060291595A1 (en) * 2005-06-28 2006-12-28 Bachu Raja S Communications channel symbol recovery by combining outputs at different decision delays
CN101155021A (zh) * 2006-09-30 2008-04-02 华为技术有限公司 移动通信中的同步方法和同步系统
KR100937513B1 (ko) * 2007-08-31 2010-01-19 뮤텔테크놀러지 주식회사 다중 송수신 안테나를 사용하는 이동 통신 시스템에서트렐리스 구조를 이용한 심볼 검출 방법
CN101345567B (zh) * 2008-08-21 2012-10-10 成都九洲电子信息系统股份有限公司 基于同步序列的分集接收方法及装置
CN110995379B (zh) * 2019-12-06 2021-03-30 武汉大学 一种面向ofdm无线通信系统的信道预测系统及方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE463540B (sv) * 1988-09-19 1990-12-03 Ericsson Telefon Ab L M Saett foer att i ett radiokommunikationssystem digitalisera godtyckliga radiosignaler samt anordning foer utoevande av saettet
IT1230284B (it) * 1989-06-15 1991-10-18 Italtel Spa Procedimento e dispositivo per la ricezione di segnali in sistemi radiomobili digitali.
US5031193A (en) * 1989-11-13 1991-07-09 Motorola, Inc. Method and apparatus for diversity reception of time-dispersed signals
SE465597B (sv) * 1990-02-16 1991-09-30 Ericsson Telefon Ab L M Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner
EP0449327B1 (en) * 1990-03-30 1998-07-15 Nec Corporation Noise-immune space diversity receiver
US5436928A (en) * 1991-04-08 1995-07-25 Nippon Telegraph And Telephone Corporation Method and apparatus for equalizing transmission line characteristics which vary at high speed in mobile radio communication
US5285480A (en) * 1991-09-03 1994-02-08 General Electric Company Adaptive MLSE-VA receiver for digital cellular radio
JP2683665B2 (ja) * 1991-11-27 1997-12-03 日本電気株式会社 最尤系列推定装置
CA2083304C (en) * 1991-12-31 1999-01-26 Stephen R. Huszar Equalization and decoding for digital communication channel
US5263053A (en) * 1992-03-24 1993-11-16 Novatel Communications Ltd. Fractionally spaced maximum likelihood sequence estimation receiver
US5313495A (en) * 1992-05-12 1994-05-17 Hughes Aircraft Company Demodulator for symbols transmitted over a cellular channel

Also Published As

Publication number Publication date
CA2189121C (en) 2005-07-26
US5499272A (en) 1996-03-12
FI964743A0 (fi) 1996-11-28
JPH10501387A (ja) 1998-02-03
FI964743A (fi) 1996-11-28
CN1078410C (zh) 2002-01-23
WO1995033314A1 (en) 1995-12-07
AU2655895A (en) 1995-12-21
CN1149363A (zh) 1997-05-07
EP0763286A1 (en) 1997-03-19
CA2189121A1 (en) 1995-12-07

Similar Documents

Publication Publication Date Title
BR9507904A (pt) Receptor de comunicações digital processo para equalização de junta e combinação de diversidade em um receptor de comunicações digital e sistema de comunicações digital
BR9507529A (pt) Sistema de comunicações receptor e processo para demodular coerentemente um sinal recebido
BR9107237A (pt) Sistema e processo de equalizacao e receptor em sistema de comunicacao
GB9929338D0 (en) System and method for securing available communications network resources
BR9707891A (pt) Processo e aparelho de comunicação e receptor
BR9612534A (pt) Receptor de rádio processo de recepção de sinais de rádio e sistema de comunicação de rádio
EP0994427A4 (en) METHOD AND SYSTEM FOR DIGITAL DATA TRANSMISSION / RECEPTION
DE69840087D1 (de) Datenübertragungs-/Empfangsvorrichtung und Verfahren und Datenübertragunggsystem
BR9605910A (pt) Processo e sistema para fornecer automaticament ligaçao de telecommunicaçao
HUP9902442A3 (en) System and method for transmitting data
DE69832002D1 (de) Übertragungssystem und Übertragungsverfahren,Empfangssystem und Empfangsverfahren
IL134256A0 (en) System and method for transmitting and receiving data
ID19369A (id) Sistim dan peralatan penerima dan transmisi data dan metoda transmisi data dan metoda pengatur parameter untuk peralatan penerima data
DE69725778D1 (de) Druckerkommunikationssystem und -verfahren
AU2001229067A1 (en) Secure network architecture method and apparatus
IL108645A (en) Protected communication method and system
BR9612162A (pt) Receptor em um sistema de comunicações sem fio digital para conduzir símbolos de informação digital e processo de recepção de símbolo
GB9905832D0 (en) Login permission method and system
BR9505644A (pt) Processo de comunicação por fac-simile sistema de comunicação por chamada seletiva e processo e receptor de chamada seletiva para receber informação relativa a radiochamada e facsimile
DE69732356D1 (de) Sende- und empfangsverfahren sowie system und empfänger dafür
GB2331207B (en) Digital communication system and method
SG74103A1 (en) Document transmit system and document transmitting method
BR9812672B1 (pt) processo e sistema de estação radiobase para a transmissão de voz através de uma interface de rádio em um sistema de radiocomunicações digital.
BR9500832A (pt) Processo para transmissão de dados,transmissor e receptor
FI99067B (fi) Vastaanottomenetelmä ja vastaanotin

Legal Events

Date Code Title Description
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FF Decision: intention to grant
FG9A Patent or certificate of addition granted
B24C Patent annual fee: request for for restoration

Free format text: REFERENTE A 13A,14A,15AE 16A ANUIDADES

B24H Lapse because of non-payment of annual fees (definitively: art 78 iv lpi)
B24F Patent annual fee: publication cancelled

Free format text: ANULADA A PUBLICACAO CODIGO 24.8 NA RPI NO 2257 DE 08/04/2014 POR TER SIDO INDEVIDA.

B21F Lapse acc. art. 78, item iv - on non-payment of the annual fees in time

Free format text: REFERENTE AS 13A, 14A, 15A E 16A ANUIDADES.

B24J Lapse because of non-payment of annual fees (definitively: art 78 iv lpi, resolution 113/2013 art. 12)

Free format text: EM VIRTUDE DA EXTINCAO PUBLICADA NA RPI 2606 DE 15-12-2020 E CONSIDERANDO AUSENCIA DE MANIFESTACAO DENTRO DOS PRAZOS LEGAIS, INFORMO QUE CABE SER MANTIDA A EXTINCAO DA PATENTE E SEUS CERTIFICADOS, CONFORME O DISPOSTO NO ARTIGO 12, DA RESOLUCAO 113/2013.