DK0443997T3 - Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner - Google Patents

Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner

Info

Publication number
DK0443997T3
DK0443997T3 DK91850015.8T DK91850015T DK0443997T3 DK 0443997 T3 DK0443997 T3 DK 0443997T3 DK 91850015 T DK91850015 T DK 91850015T DK 0443997 T3 DK0443997 T3 DK 0443997T3
Authority
DK
Denmark
Prior art keywords
tij
delta
viterbi
signals
antennas
Prior art date
Application number
DK91850015.8T
Other languages
Danish (da)
English (en)
Inventor
Tomas Olof Baeckstroem
Ragnar Erik Kahre
Jan-Erik Stjernvall
Original Assignee
Ericsson Telefon Ab L M
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 Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Application granted granted Critical
Publication of DK0443997T3 publication Critical patent/DK0443997T3/da

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B15/00—Suppression or limitation of noise or interference
    • H04B15/02—Reducing interference from electric apparatus by means located at or near the interfering apparatus
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/23—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using convolutional codes, e.g. unit memory codes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01Q—ANTENNAS, i.e. RADIO AERIALS
    • H01Q21/00—Antenna arrays or systems
    • H01Q21/29—Combinations of different interacting antenna units for giving a desired directional characteristic
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
    • H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
    • H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
    • 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
    • H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
    • 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
    • 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
    • H04L25/03184—Details concerning the metric
    • 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
    • H04L25/03331—Arrangements for the joint estimation of multiple sequences
    • 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)
  • Physics & Mathematics (AREA)
  • Probability & Statistics with Applications (AREA)
  • Power Engineering (AREA)
  • Theoretical Computer Science (AREA)
  • Error Detection And Correction (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Details Of Aerials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Noise Elimination (AREA)
DK91850015.8T 1990-02-16 1991-01-29 Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner DK0443997T3 (da)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9000566A SE465597B (sv) 1990-02-16 1990-02-16 Foerfarande att reducera inverkan av faedning hos en viterbimottagare med minst tvaa antenner

Publications (1)

Publication Number Publication Date
DK0443997T3 true DK0443997T3 (da) 1995-05-08

Family

ID=20378589

Family Applications (1)

Application Number Title Priority Date Filing Date
DK91850015.8T DK0443997T3 (da) 1990-02-16 1991-01-29 Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner

Country Status (15)

Country Link
US (1) US5191598A (fr)
EP (1) EP0443997B1 (fr)
JP (1) JP3113293B2 (fr)
KR (1) KR960013962B1 (fr)
CN (1) CN1025400C (fr)
AT (1) ATE114906T1 (fr)
AU (1) AU634629B2 (fr)
CA (1) CA2036423C (fr)
DE (1) DE69105298T2 (fr)
DK (1) DK0443997T3 (fr)
ES (1) ES2064981T3 (fr)
HK (1) HK34495A (fr)
MY (1) MY104741A (fr)
NZ (1) NZ236924A (fr)
SE (1) SE465597B (fr)

Families Citing this family (52)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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
DE4135953A1 (de) * 1991-10-31 1993-05-06 Rohde & Schwarz Gmbh & Co Kg, 8000 Muenchen, De Verfahren zum bestimmen der komplexen impulsantwort eines funkkanals
EP0546614B1 (fr) * 1991-12-07 1997-05-07 Philips Patentverwaltung GmbH Récepteur radio mobile dont la synchronisation initiale avec la station fixe est améliorée par reconnaissance d'impulsions permettant l'estimation de fréquence
CA2083304C (fr) * 1991-12-31 1999-01-26 Stephen R. Huszar Egalisation et decodage pour canal de communication numerique
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
US5319677A (en) * 1992-05-12 1994-06-07 Hughes Aircraft Company Diversity combiner with MLSE for digital cellular radio
US5621769A (en) * 1992-06-08 1997-04-15 Novatel Communications Ltd. Adaptive-sequence-estimation apparatus employing diversity combining/selection
US5577068A (en) * 1992-06-08 1996-11-19 Ericsson Ge Mobile Communications Inc. Generalized direct update viterbi equalizer
SE470371B (sv) * 1992-06-23 1994-01-31 Ericsson Telefon Ab L M Sätt och anordning vid digital signalöverföring att hos en mottagare estimera överförda symboler
DE4224214C2 (de) * 1992-07-22 1995-02-09 Deutsche Forsch Luft Raumfahrt Verfahren zur quellengesteuerten Kanaldecodierung durch Erweiterung des Viterbi-Algorithmus
US5432821A (en) * 1992-12-02 1995-07-11 University Of Southern California System and method for estimating data sequences in digital transmissions
US5289499A (en) * 1992-12-29 1994-02-22 At&T Bell Laboratories Diversity for direct-sequence spread spectrum systems
US5414734A (en) * 1993-01-06 1995-05-09 Glenayre Electronics, Inc. Compensation for multi-path interference using pilot symbols
US5465412A (en) * 1993-05-19 1995-11-07 Motorola, Inc. Apparatus and method for determining a point in time for detecting a sampled signal in a receiver
US5668837A (en) * 1993-10-14 1997-09-16 Ericsson Inc. Dual-mode radio receiver for receiving narrowband and wideband signals
AU678626B2 (en) * 1993-10-14 1997-06-05 Ericsson Ge Mobile Communications Inc. Adaptive bandwidth receiver
US5563918A (en) * 1993-12-17 1996-10-08 Rockwell International Method of selecting optimum frequency in skywave communication apparatus
US6151310A (en) * 1994-03-24 2000-11-21 Ericsson Inc. Dividable transmit antenna array for a cellular base station and associated method
US6201801B1 (en) 1994-03-24 2001-03-13 Ericsson Inc. Polarization diversity phased array cellular base station and associated methods
US5832389A (en) * 1994-03-24 1998-11-03 Ericsson Inc. Wideband digitization systems and methods for cellular radiotelephones
US5499272A (en) * 1994-05-31 1996-03-12 Ericsson Ge Mobile Communications Inc. Diversity receiver for signals with multipath time dispersion
US6081566A (en) * 1994-08-02 2000-06-27 Ericsson, Inc. Method and apparatus for interference rejection with different beams, polarizations, and phase references
US5481572A (en) * 1994-08-02 1996-01-02 Ericsson Inc. Method of and apparatus for reducing the complexitiy of a diversity combining and sequence estimation receiver
US5680419A (en) * 1994-08-02 1997-10-21 Ericsson Inc. Method of and apparatus for interference rejection combining in multi-antenna digital cellular communications systems
US6173014B1 (en) * 1994-08-02 2001-01-09 Telefonaktiebolaget Lm Ericsson Method of and apparatus for interference rejection combining and downlink beamforming in a cellular radio communications system
US5550872A (en) * 1994-10-24 1996-08-27 Motorola, Inc. Method and apparatus for Fast Fourier Transform based maximal ratio combining
US5586128A (en) * 1994-11-17 1996-12-17 Ericsson Ge Mobile Communications Inc. System for decoding digital data using a variable decision depth
US5903834A (en) * 1995-10-06 1999-05-11 Telefonaktiebolaget L/M Ericsson Distributed indoor digital multiple-access cellular telephone system
US5905742A (en) * 1995-12-27 1999-05-18 Ericsson Inc. Method and apparauts for symbol decoding
US6421543B1 (en) 1996-01-29 2002-07-16 Ericsson Inc. Cellular radiotelephone base stations and methods using selected multiple diversity reception
US5838739A (en) * 1996-03-29 1998-11-17 Ericsson Inc. Channel estimator circuitry, and associated method, for a digital communication system
US5796788A (en) * 1996-04-19 1998-08-18 Ericsson Inc. Method and apparatus for interference decorrelation in time and space
US5727028A (en) * 1996-07-31 1998-03-10 Motorola, Inc. Method and apparatus for receiving a signal in a digital radio frequency communication system
US5881073A (en) * 1996-09-20 1999-03-09 Ericsson Inc. Convolutional decoding with the ending state decided by CRC bits placed inside multiple coding bursts
US5889827A (en) 1996-12-12 1999-03-30 Ericsson Inc. Method and apparatus for digital symbol detection using medium response estimates
US6067295A (en) * 1997-01-13 2000-05-23 Lucent Technologies, Inc. Method and apparatus for reducing error in recovering information bits in a wireless system
US5933421A (en) 1997-02-06 1999-08-03 At&T Wireless Services Inc. Method for frequency division duplex communications
US6108517A (en) * 1997-07-28 2000-08-22 Ericsson Inc. Methods and apparatus for joint demodulation of adjacent channel signals in digital communications systems
US5907582A (en) * 1997-08-11 1999-05-25 Orbital Sciences Corporation System for turbo-coded satellite digital audio broadcasting
US6470192B1 (en) 1999-08-16 2002-10-22 Telefonaktiebolaget Lm Ericcson (Publ) Method of an apparatus for beam reduction and combining in a radio communications system
US6487259B1 (en) 1999-08-24 2002-11-26 Motorola, Inc. Partially-parrallel trellis decoder apparatus and method
EP1152576B8 (fr) 2000-05-05 2009-12-23 Agere Systems, Inc. Estimation conjointe par l'utilisation des algorithmes M ou T, dans des systèmes à plusieurs antennes
US7515659B2 (en) 2001-05-04 2009-04-07 Agere Systems Inc. Decoding techniques for multi-antenna systems
US6847690B1 (en) 2000-11-22 2005-01-25 Telefonaktiebolaget Lm Ericsson (Publ) Determinant-based synchronization techniques and systems
US6771705B2 (en) * 2001-02-01 2004-08-03 Nokia Corporation Turbo encoder with transmitter diversity
US7149258B2 (en) * 2001-11-28 2006-12-12 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for estimation of phase offset between communication channels
US7346126B2 (en) * 2001-11-28 2008-03-18 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for channel estimation using plural channels
US7689188B2 (en) * 2006-09-29 2010-03-30 Broadcom Corporation Method and system for dynamically tuning and calibrating an antenna using antenna hopping
US8116259B2 (en) * 2006-09-29 2012-02-14 Broadcom Corporation Method and system for diversity processing based on antenna switching
US8346091B2 (en) 2009-04-29 2013-01-01 Andrew Llc Distributed antenna system for wireless network systems
WO2014070236A1 (fr) 2012-10-31 2014-05-08 Andrew Llc Transport numérique en bande de base dans des systèmes de distribution de télécommunications
EP2979410B1 (fr) 2013-03-28 2018-04-25 Nokia Solutions and Networks Oy Estimation de canal dans les communications mobiles avec beamforming

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3633107A (en) * 1970-06-04 1972-01-04 Bell Telephone Labor Inc Adaptive signal processor for diversity radio receivers
US4283788A (en) * 1976-06-25 1981-08-11 Cselt - Centro Studi E Laboratori Telecomunicazioni S.P.A. Equalization system with preshaping filter
US4847871A (en) * 1987-01-28 1989-07-11 Matsushita Electric Industrial Co., Ltd. Viterbi detector for digital signal
US4733402A (en) * 1987-04-23 1988-03-22 Signatron, Inc. Adaptive filter equalizer systems
NO163120C (no) * 1987-05-19 1990-04-04 Sintef Fremgangsmaate ved demodulasjon i digitale kommunikasjonssystemer med flerbane-propagasjon.
US4881241A (en) * 1988-02-24 1989-11-14 Centre National D'etudes Des Telecommunications Method and installation for digital communication, particularly between and toward moving vehicles
GB2215567B (en) * 1988-03-05 1992-11-18 Plessey Co Plc Improvements in or relating to equalisers
US5031193A (en) * 1989-11-13 1991-07-09 Motorola, Inc. Method and apparatus for diversity reception of time-dispersed signals

Also Published As

Publication number Publication date
KR910016163A (ko) 1991-09-30
SE9000566L (sv) 1991-08-17
SE9000566D0 (sv) 1990-02-16
CA2036423A1 (fr) 1991-08-17
AU7107491A (en) 1991-08-22
EP0443997B1 (fr) 1994-11-30
DE69105298D1 (de) 1995-01-12
MY104741A (en) 1994-05-31
SE465597B (sv) 1991-09-30
CA2036423C (fr) 1996-12-17
ATE114906T1 (de) 1994-12-15
DE69105298T2 (de) 1995-04-13
JP3113293B2 (ja) 2000-11-27
KR960013962B1 (ko) 1996-10-10
CN1025400C (zh) 1994-07-06
ES2064981T3 (es) 1995-02-01
US5191598A (en) 1993-03-02
CN1054156A (zh) 1991-08-28
EP0443997A1 (fr) 1991-08-28
JPH04215334A (ja) 1992-08-06
AU634629B2 (en) 1993-02-25
HK34495A (en) 1995-03-17
NZ236924A (en) 1993-03-26

Similar Documents

Publication Publication Date Title
DK0443997T3 (da) Fremgangsmåde til reduktion af virkningen af fading i en viterbi-modtager med i det mindste to antenner
US5349612A (en) Digital serializer and time delay regulator
SE9102612D0 (sv) Foerfarande att bilda ett kanalestimat foer en tidsvarierande radiokanal
CA2180311A1 (fr) Recepteur a ponderation et a decodage
JP2004507963A (ja) データ・アイ・トラッキングを用いたデータ復元
EP0602249A4 (fr) Dispositif et procede d'estimation de sequence probabiliste maximale.
US5103465A (en) Symbol synchronization circuit
EP1138136B1 (fr) Procede de suivi de synchronisation
US6487259B1 (en) Partially-parrallel trellis decoder apparatus and method
US6798726B2 (en) Data decoding
US20030014683A1 (en) Receiver with automatic skew compensation
US20100150289A1 (en) Clock reproducing apparatus and method
ATE166485T1 (de) Übertragungssystem mit einem empfänger mit verbesserten taktregenerationsmitteln
KR100235819B1 (ko) 3진 신호로부터 2진 비트 스트림을 재생하기 위한 방법 및 회로
CN1316777C (zh) 决定取样相位之单元
US6963625B2 (en) Dada decoding
WO2004010666A1 (fr) Recepteur fsk possedant une etape d'eminceur a seuil variable et procede correspondant
US6542103B2 (en) Error signal generating arrangement
WO2002078228A3 (fr) Recepteur a compensation d'obliquite automatique
EA199900415A1 (ru) Способ одновременной фазовой синхронизации и декодирования, использующий критерий максимального правдоподобия, и соответствующее устройство
TH16664A (th) วิธีการลดผลกระทบของการเปลี่ยนแปลงสัญญาณของเครื่องรับแบบไวเตอร์บิที่มีเสาอากาศอย่างน้อยสองตัว
Chaichanavong et al. Kalman filtering applied to timing recovery in tracking mode
Mielczarek et al. Influence of the phase and timing offset on the BCJR algorithm performance
Coulton et al. Intrinsic block, symbol and bit synchronisation
SE9002664D0 (sv) Saett och anordning att i ett radiosystem bestaemma en mottagen informationsbaerande datasekvens