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)
  • Probability & Statistics with Applications (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Power Engineering (AREA)
  • Error Detection And Correction (AREA)
  • Radio Transmission System (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Details Of Aerials (AREA)
  • Noise Elimination (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (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)

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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
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US5563918A (en) * 1993-12-17 1996-10-08 Rockwell International Method of selecting optimum frequency in skywave communication apparatus
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
US6151310A (en) * 1994-03-24 2000-11-21 Ericsson Inc. Dividable transmit antenna array for a cellular base station and associated method
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
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
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
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
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US6108517A (en) * 1997-07-28 2000-08-22 Ericsson Inc. Methods and apparatus for joint demodulation of adjacent channel signals in digital communications systems
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US7346126B2 (en) * 2001-11-28 2008-03-18 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for channel estimation using plural channels
US7149258B2 (en) * 2001-11-28 2006-12-12 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for estimation of phase offset between communication channels
US7689188B2 (en) * 2006-09-29 2010-03-30 Broadcom Corporation Method and system for dynamically tuning and calibrating an antenna using antenna hopping
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Also Published As

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

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