ES2168272T3 - Metodo y aparato de desmodulacion bidireccional. - Google Patents

Metodo y aparato de desmodulacion bidireccional.

Info

Publication number
ES2168272T3
ES2168272T3 ES93850197T ES93850197T ES2168272T3 ES 2168272 T3 ES2168272 T3 ES 2168272T3 ES 93850197 T ES93850197 T ES 93850197T ES 93850197 T ES93850197 T ES 93850197T ES 2168272 T3 ES2168272 T3 ES 2168272T3
Authority
ES
Spain
Prior art keywords
symbols
data
unknown
demodulated
reference signs
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.)
Expired - Lifetime
Application number
ES93850197T
Other languages
English (en)
Inventor
Paul W Dent
Sandeep Chennakeshu
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
Application granted granted Critical
Publication of ES2168272T3 publication Critical patent/ES2168272T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
    • H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
    • 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
    • H04B7/0848—Joint weighting
    • H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
    • 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
    • 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
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03535—Variable structures
    • H04L2025/03547—Switching between time domain structures
    • H04L2025/0356—Switching the time direction of equalisation

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Error Detection And Correction (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Telephone Function (AREA)
  • Inspection Of Paper Currency And Valuable Securities (AREA)
  • Circuits Of Receivers In General (AREA)
  • Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
  • Radio Transmission System (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Selective Calling Equipment (AREA)

Abstract

SE DESCRIBE UN APARATO PARA DEMODULAR SIMBOLOS DE DATOS TRANSMITIDOS A TRAVES DE UN CANAL DE COMUNICACION DE DESVANECIMIENTO DE SEÑAL. SE RECIBEN SECUENCIALMENTE VARIOS PRIMEROS SIMBOLOS DE DATOS PREDETERMINADOS, VARIOS SIMBOLOS DE DATOS DESCONOCIDOS Y VARIOS SEGUNDOS SIMBOLOS DE DATOS PREDETERMINADOS. LAS CANTIDADES RECIBIDAS DE SIMBOLOS DE DATOS SE ALMACENAN, Y SE DETERMINAN RESPECTIVAMENTE UN PRIMER Y SEGUNDO EQUIPO DE SEÑALES DE REFERENCIA A PARTIR DE LAS PRIMERAS Y SEGUNDAS CANTIDADES ALMACENADAS DE SIMBOLOS DE DATOS PREDETERMINADOS. LOS SIMBOLOS DE DATOS DESCONOCIDOS ALMACENADOS BASADOS EN EL PRIMER EQUIPO DE SEÑALES DE REFERENCIA, SE DEMODULAN HACIA DELANTE COMENZANDO POR LOS SIMBOLOS DESCONOCIDOS RECIBIDOS MAS CERCA DE LOS PRIMEROS SIMBOLOS DE DATOS. LOS SIMBOLOS DESCONOCIDOS BASADOS EN EL SEGUNDO EQUIPO DE SEÑALES DE REFERENCIA SE DEMODULAN HACIA ATRAS COMENZANDO POR LOS SIMBOLOS DE DATOS DESCONOCIDOS RECIBIDOS MAS CERCA DE LOS SEGUNDOS SIMBOLOS DE DATOS. SE DETERMINAN, SE COMPARANY SE SELECCIONAN BASANDOSE EN LA COMPARACION LOS VALORES DE CALIDAD INDICATIVOS DE LAS CALIDADES DE LOS SIMBOLOS DE DATOS DEMODULADOS HACIA DELANTE Y HACIA ATRAS.
ES93850197T 1992-10-22 1993-10-19 Metodo y aparato de desmodulacion bidireccional. Expired - Lifetime ES2168272T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/965,848 US5335250A (en) 1992-10-22 1992-10-22 Method and apparatus for bidirectional demodulation of digitally modulated signals

Publications (1)

Publication Number Publication Date
ES2168272T3 true ES2168272T3 (es) 2002-06-16

Family

ID=25510587

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93850197T Expired - Lifetime ES2168272T3 (es) 1992-10-22 1993-10-19 Metodo y aparato de desmodulacion bidireccional.

Country Status (13)

Country Link
US (1) US5335250A (es)
EP (1) EP0594551B1 (es)
CN (1) CN1070667C (es)
AT (1) ATE213372T1 (es)
AU (1) AU5446394A (es)
DE (1) DE69331571T2 (es)
DK (1) DK0594551T3 (es)
ES (1) ES2168272T3 (es)
MY (1) MY110069A (es)
PH (1) PH31516A (es)
SG (1) SG43305A1 (es)
TW (1) TW266364B (es)
WO (1) WO1994009582A1 (es)

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Also Published As

Publication number Publication date
DE69331571T2 (de) 2002-09-26
EP0594551A1 (en) 1994-04-27
ATE213372T1 (de) 2002-02-15
AU5446394A (en) 1994-05-09
US5335250A (en) 1994-08-02
EP0594551B1 (en) 2002-02-13
DK0594551T3 (da) 2002-03-11
MY110069A (en) 1997-12-31
CN1100579A (zh) 1995-03-22
SG43305A1 (en) 1997-10-17
WO1994009582A1 (en) 1994-04-28
PH31516A (en) 1998-11-03
TW266364B (es) 1995-12-21
CN1070667C (zh) 2001-09-05
DE69331571D1 (de) 2002-03-21

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