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 Lucent SAS
Nokia Inc
Original Assignee
Alcatel SA
Nokia 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 Alcatel SA, Nokia Inc filed Critical Alcatel 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)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (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 (7)

* 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
DE102013003622A1 (de) 2013-02-18 2014-08-21 Karlsruher Institut für Technologie Verfahren und Vorrichtung zum Auslesen eines Ein- und/oder Mehrträgersignals

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

Similar Documents

Publication Publication Date Title
KR970707659A (ko) 안테나 다이버시티 기술(Antenna Diversity Techniques)
ES2161706T3 (es) Diversidad para sistemas de espectro de difusion de secuencia directa.
ES2118811T3 (es) Sistema y procedimiento de comunicaciones de espectro expandido sincrono.
KR970068214A (ko) Cdma방식의 휴대용 무선송신장치
CN102932089B (zh) 基于超密集波分复用的多载波码分复用光传输系统和方法
KR920022707A (ko) 다수의 원격 송신 및 수신국을 동기화 하기 위한 장치 및 방법
MX9206003A (es) Metodo y sistema radiodifusor de frecuencia de radio, que utiliza satelites de orbita geosincronica.
ES2159540T3 (es) Receptor, con multiplexor de division ortogonal de frecuencia, con compensacion para retardos diferenciales.
AR019597A1 (es) Medio de determinacion de demora de propagacion de multitrayecto que usa simbolos piloto insertados periodicamente
SE9703585L (sv) Kommunikationsanordning
EP0360476A3 (en) Homodyne-type spread spectrum transmitter/receiver
CA2270608A1 (en) Apparatus for communicating diversity signals over a transmission medium
CA2109530A1 (en) Frequency diversity transmitter and receiver system
MX173446B (es) Sistema de telefonia microcelular cdma y sistema de antena distribuida para el mismo
ES2157100T3 (es) Antena para la recepcion de radio y television en automoviles.
KR950028328A (ko) 디지탈 무선 통신장치에 있어서 송수신 신호처리회로
AR013957A1 (es) Un aparato de comunicacion por radio.
RU98100752A (ru) Высокоэффективная суборбитальная высотная телекоммуникационная система и способ создания беспроводных телекоммуникаций
ES2162830T3 (es) Metodo y aparato para combinar señales de banda base y recuperar el sincronismo utilizando un algoritmo de modulo constante.
US3908088A (en) Time division multiple access communications system
US3842352A (en) Communications system having single rf channel diversity means
ES2182343T3 (es) Sistema de telecomunicacion.
EA200001067A1 (ru) Грубая синхронизация частоты в системах с множеством несущих
ITRM980347A1 (it) Sistema per trasmettere e ricevere segnali cdma polarizzati e procedimento di funzionamento
CN100499388C (zh) 无线通信设备和利用其的无线通信系统

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 632604

Country of ref document: ES