ES2162830T3 - Metodo y aparato para combinar señales de banda base y recuperar el sincronismo utilizando un algoritmo de modulo constante. - Google Patents

Metodo y aparato para combinar señales de banda base y recuperar el sincronismo utilizando un algoritmo de modulo constante.

Info

Publication number
ES2162830T3
ES2162830T3 ES94110075T ES94110075T ES2162830T3 ES 2162830 T3 ES2162830 T3 ES 2162830T3 ES 94110075 T ES94110075 T ES 94110075T ES 94110075 T ES94110075 T ES 94110075T ES 2162830 T3 ES2162830 T3 ES 2162830T3
Authority
ES
Spain
Prior art keywords
algorithm
base band
synchronism
recovering
constant module
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
ES94110075T
Other languages
English (en)
Inventor
Franco Guglielmi
Carlo Luschi
Arnaldo Spalvieri
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.)
Alcatel CIT SA
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Application granted granted Critical
Publication of ES2162830T3 publication Critical patent/ES2162830T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • H04B7/0854—Joint weighting using error minimizing algorithms, e.g. minimum mean squared error [MMSE], "cross-correlation" or matrix inversion

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Radio Transmission System (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Amplitude Modulation (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

LA INVENCION SE REFIERE A UN COMBINADOR DE SEÑALES DE BANDA BASE Y A UN MUESTREADOR NORMALMENTE UTILIZADOS EN LOS SISTEMAS DE RADIOENLACES PERO TAMBIEN EN SISTEMAS DE TELECOMUNICACIONES GENERICOS. PARA EVITAR LAS FALLAS TEMPORALES EN LOS ENLACES DE ESPACIO LIBRE, SE UTILIZAN TECNICAS DE DIVERSIDAD DE ESPACIO Y/O FRECUENCIA, QUE CONSISTEN EN EL USO DE DOS ANTENAS RECEPTORAS SEPARADAS O DE DOS FRECUENCIAS DE TRANSMISION. SI SE COMBINAN DE FORMA ADECUADA LAS SEÑALES ASI RECIBIDAS, SE PUEDEN REDUCIR LAS FALLAS EN LOS RADIOENLACES. EN LA INVENCION SE PRESENTA EL USO DE UN ALGORITMO PARTICULAR DEL TIPO CMA (ALGORITMO DE MODULO CONSTANTE) QUE, SIENDO INDEPENDIENTE DE LA FASE DE SEÑAL COMBINADA, NO INTERACTUA CON LOS CIRCUITOS DE RECUPERACION DE LA PORTADORA. ADEMAS, SI SE APLICA EL MISMO ALGORITMO AL MISMO MUESTREADOR TAMBIEN, SE CONSIGUE LA COOPERACION DE LOS DOS CIRCUITOS PARA OPTIMIZAR LA SEÑAL DE SALIDA.
ES94110075T 1993-07-02 1994-06-29 Metodo y aparato para combinar señales de banda base y recuperar el sincronismo utilizando un algoritmo de modulo constante. Expired - Lifetime ES2162830T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT93MI001428A IT1264645B1 (it) 1993-07-02 1993-07-02 Metodo e circuiti di combinazione di segnali in banda base e recupero dei sincronismi di simbolo

Publications (1)

Publication Number Publication Date
ES2162830T3 true ES2162830T3 (es) 2002-01-16

Family

ID=11366517

Family Applications (1)

Application Number Title Priority Date Filing Date
ES94110075T Expired - Lifetime ES2162830T3 (es) 1993-07-02 1994-06-29 Metodo y aparato para combinar señales de banda base y recuperar el sincronismo utilizando un algoritmo de modulo constante.

Country Status (8)

Country Link
US (1) US5592516A (es)
EP (1) EP0632604B1 (es)
JP (1) JPH07154442A (es)
AT (1) ATE205342T1 (es)
DE (1) DE69428168T2 (es)
ES (1) ES2162830T3 (es)
IT (1) IT1264645B1 (es)
NO (1) NO309836B1 (es)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5590173A (en) * 1992-08-05 1996-12-31 Beasley; Andrew S. Delay insensitive base station-to-handset interface for radio telephone systems
FI105514B (fi) * 1994-09-12 2000-08-31 Nokia Mobile Phones Ltd Vastaanottomenetelmä ja vastaanotin
US6493838B1 (en) * 1995-09-29 2002-12-10 Kabushiki Kaisha Toshiba Coding apparatus and decoding apparatus for transmission/storage of information
WO1997026720A1 (en) * 1996-01-19 1997-07-24 Pcs Wireless (Ip) Inc. Delay insensitive basestation-to-handset interface for radio telephone systems
US6560299B1 (en) * 1999-07-30 2003-05-06 Christopher H Strolle Diversity receiver with joint signal processing
US7103118B2 (en) * 2001-11-26 2006-09-05 Dataradio Inc. Vectorial combiner for diversity reception in RF tranceivers

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4512034A (en) * 1983-07-11 1985-04-16 At&T Bell Laboratories Technique for digital radio space diversity combining
US4797950A (en) * 1986-11-10 1989-01-10 Kenneth Rilling Multipath reduction system

Also Published As

Publication number Publication date
NO942408D0 (es) 1994-06-24
ATE205342T1 (de) 2001-09-15
EP0632604B1 (en) 2001-09-05
DE69428168T2 (de) 2002-05-16
NO942408L (no) 1995-01-03
JPH07154442A (ja) 1995-06-16
EP0632604A1 (en) 1995-01-04
US5592516A (en) 1997-01-07
ITMI931428A0 (it) 1993-07-02
DE69428168D1 (de) 2001-10-11
NO309836B1 (no) 2001-04-02
IT1264645B1 (it) 1996-10-04
ITMI931428A1 (it) 1995-01-02

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