AU2001236865A1 - Delayed decision feedback log-map equalizer - Google Patents

Delayed decision feedback log-map equalizer

Info

Publication number
AU2001236865A1
AU2001236865A1 AU2001236865A AU3686501A AU2001236865A1 AU 2001236865 A1 AU2001236865 A1 AU 2001236865A1 AU 2001236865 A AU2001236865 A AU 2001236865A AU 3686501 A AU3686501 A AU 3686501A AU 2001236865 A1 AU2001236865 A1 AU 2001236865A1
Authority
AU
Australia
Prior art keywords
decision feedback
delayed decision
feedback log
map equalizer
equalizer
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.)
Abandoned
Application number
AU2001236865A
Inventor
Jung-Fu Cheng
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.)
Ericsson Inc
Original Assignee
Ericsson 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 Inc filed Critical Ericsson Inc
Publication of AU2001236865A1 publication Critical patent/AU2001236865A1/en
Abandoned legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • 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
    • H04L25/03171—Arrangements involving maximum a posteriori probability [MAP] detection
    • 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
    • H04L25/03312—Arrangements specific to the provision of output signals
    • H04L25/03318—Provision of soft decisions
    • 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
    • H04L25/03203—Trellis search techniques
    • H04L25/03235—Trellis search techniques with state-reduction using feedback filtering

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Error Detection And Correction (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
AU2001236865A 2000-02-14 2001-02-12 Delayed decision feedback log-map equalizer Abandoned AU2001236865A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US09503788 2000-02-14
US09/503,788 US6658071B1 (en) 2000-02-14 2000-02-14 Delayed decision feedback log-map equalizer
PCT/US2001/004312 WO2001061952A1 (en) 2000-02-14 2001-02-12 Delayed decision feedback log-map equalizer

Publications (1)

Publication Number Publication Date
AU2001236865A1 true AU2001236865A1 (en) 2001-08-27

Family

ID=24003506

Family Applications (1)

Application Number Title Priority Date Filing Date
AU2001236865A Abandoned AU2001236865A1 (en) 2000-02-14 2001-02-12 Delayed decision feedback log-map equalizer

Country Status (5)

Country Link
US (1) US6658071B1 (en)
EP (1) EP1256218A1 (en)
JP (1) JP2003523148A (en)
AU (1) AU2001236865A1 (en)
WO (1) WO2001061952A1 (en)

Families Citing this family (36)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6707849B1 (en) * 2000-02-08 2004-03-16 Ericsson Inc. Methods, receivers and equalizers having increased computational efficiency
FI111888B (en) * 2000-02-25 2003-09-30 Nokia Corp An adaptive method and system for implementing gradual redundancy at the reception
US7096412B2 (en) * 2000-06-19 2006-08-22 Trellisware Technologies, Inc. Method for iterative and non-iterative data detection using reduced-state soft-input/soft-output algorithms for complexity reduction
FR2829326A1 (en) * 2001-09-06 2003-03-07 France Telecom SUB-OPTIMAL ITERATIVE RECEPTION PROCESS AND SYSTEM FOR CDMA HIGH SPEED TRANSMISSION SYSTEM
US6961921B2 (en) 2001-09-06 2005-11-01 Interdigital Technology Corporation Pipeline architecture for maximum a posteriori (MAP) decoders
EP1292077A3 (en) * 2001-09-11 2006-10-11 Broadcom Corporation Sequence estimation for PSK signals
US6763493B2 (en) * 2001-09-21 2004-07-13 The Directv Group, Inc. Method and system for performing decoding using a reduced-memory implementation
KR100436434B1 (en) * 2001-11-19 2004-06-16 한국전자통신연구원 Turbo decoder that have a state metric, and Calculation method by Using it
US7353450B2 (en) * 2002-01-22 2008-04-01 Agere Systems, Inc. Block processing in a maximum a posteriori processor for reduced power consumption
US7197084B2 (en) * 2002-03-27 2007-03-27 Qualcomm Incorporated Precoding for a multipath channel in a MIMO system
US7657822B2 (en) * 2002-05-31 2010-02-02 Broadcom Corporation True bit level decoding of TTCM (turbo trellis code modulation) of variable rates and signal constellations
US7346833B2 (en) * 2002-11-05 2008-03-18 Analog Devices, Inc. Reduced complexity turbo decoding scheme
GB0229320D0 (en) * 2002-12-17 2003-01-22 Koninkl Philips Electronics Nv Signal processing method and apparatus
US7130342B2 (en) * 2002-12-27 2006-10-31 Motorola, Inc. Wireless receiver and method employing forward/backward recursive covariance based filter coefficient generation
US7246295B2 (en) 2003-04-14 2007-07-17 Agere Systems Inc. Turbo decoder employing simplified log-map decoding
KR20050042869A (en) * 2003-11-04 2005-05-11 삼성전자주식회사 MAP decoder having a simple design and a method decoding thereof
US7421041B2 (en) * 2004-03-01 2008-09-02 Qualcomm, Incorporated Iterative channel and interference estimation and decoding
GB0420183D0 (en) * 2004-09-10 2004-10-13 Ttp Communications Ltd Metric calculation utilising pre-stored values
WO2006047952A2 (en) * 2004-11-08 2006-05-11 Zhizhong Li A computer technical scheme of mixed scale, carry line digital engineering method
GB2426898B (en) * 2005-06-02 2007-05-23 Toshiba Res Europ Ltd Wireless communications apparatus
US7734466B2 (en) * 2005-06-20 2010-06-08 Motorola, Inc. Reduced complexity recursive least square lattice structure adaptive filter by means of limited recursion of the backward and forward error prediction squares
US7702711B2 (en) * 2005-06-20 2010-04-20 Motorola, Inc. Reduced complexity recursive least square lattice structure adaptive filter by means of estimating the backward and forward error prediction squares using binomial expansion
US20060288067A1 (en) * 2005-06-20 2006-12-21 Motorola, Inc. Reduced complexity recursive least square lattice structure adaptive filter by means of approximating the forward error prediction squares using the backward error prediction squares
US8094707B1 (en) 2007-03-21 2012-01-10 Arrowhead Center, Inc. List-based detection in fading channels with long intersymbol interference
US8127216B2 (en) 2007-11-19 2012-02-28 Seagate Technology Llc Reduced state soft output processing
US20090132894A1 (en) * 2007-11-19 2009-05-21 Seagate Technology Llc Soft Output Bit Threshold Error Correction
US8711984B2 (en) * 2008-01-22 2014-04-29 Agere Systems Llc Methods and apparatus for map detection with reduced complexity
KR20090083110A (en) * 2008-01-29 2009-08-03 삼성전자주식회사 Viterbi decoder and viterbi decoding method
US8208585B2 (en) * 2008-09-17 2012-06-26 Qualcomm Incorporated D-PSK demodulation based on correlation angle distribution
US8413031B2 (en) * 2008-12-16 2013-04-02 Lsi Corporation Methods, apparatus, and systems for updating loglikelihood ratio information in an nT implementation of a Viterbi decoder
US8369459B2 (en) * 2009-03-31 2013-02-05 Telefonaktiebolaget L M Ericsson (Publ) Diversity receivers and methods for relatively-delayed signals
US8331495B2 (en) * 2009-08-17 2012-12-11 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for an improved wireless communication receiver
US8374219B2 (en) * 2009-11-23 2013-02-12 Telefonaktiebolaget L M Ericsson (Publ) Blind spreading factor detection for wideband code division multiple access (WCDMA)
US8767882B2 (en) * 2010-09-17 2014-07-01 Harris Corporation Mobile wireless communications device and receiver with demodulation and related methods
US8699634B2 (en) 2011-06-30 2014-04-15 Harris Corporation Wireless communications device having map trellis decoder with partial sum tables and related methods
US9800437B2 (en) 2016-03-16 2017-10-24 Northrop Grumman Systems Corporation Parallelizable reduced state sequence estimation via BCJR algorithm

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5517527A (en) * 1992-12-11 1996-05-14 Industrial Technology Research Institute Adaptive equalizer for ISDN U-interface transceiver
JP2967710B2 (en) * 1995-09-29 1999-10-25 日本電気株式会社 Digital modulator
US6028899A (en) * 1995-10-24 2000-02-22 U.S. Philips Corporation Soft-output decoding transmission system with reduced memory requirement
US5933462A (en) 1996-11-06 1999-08-03 Qualcomm Incorporated Soft decision output decoder for decoding convolutionally encoded codewords
DE19647653A1 (en) * 1996-11-18 1998-05-20 Philips Patentverwaltung Digital transmission system with trellis-based, condition-reduced estimation method
US6044116A (en) * 1998-10-29 2000-03-28 The Aerospace Corporation Error-floor mitigated and repetitive turbo coding communication system

Also Published As

Publication number Publication date
WO2001061952A1 (en) 2001-08-23
EP1256218A1 (en) 2002-11-13
US6658071B1 (en) 2003-12-02
JP2003523148A (en) 2003-07-29

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