WO1997019557B1 - Correction de la derive de frequence dans des terminaux d'abonnes - Google Patents

Correction de la derive de frequence dans des terminaux d'abonnes

Info

Publication number
WO1997019557B1
WO1997019557B1 PCT/US1996/018495 US9618495W WO9719557B1 WO 1997019557 B1 WO1997019557 B1 WO 1997019557B1 US 9618495 W US9618495 W US 9618495W WO 9719557 B1 WO9719557 B1 WO 9719557B1
Authority
WO
WIPO (PCT)
Prior art keywords
transmit
frequency
receive
oscillator
subscriber stations
Prior art date
Application number
PCT/US1996/018495
Other languages
English (en)
Other versions
WO1997019557A1 (fr
Filing date
Publication date
Priority claimed from US08/599,406 external-priority patent/US5794119A/en
Application filed filed Critical
Priority to AU17419/97A priority Critical patent/AU716711C/en
Priority to CA002237465A priority patent/CA2237465C/fr
Priority to EP96945921A priority patent/EP0862834B1/fr
Priority to DE69636812T priority patent/DE69636812T2/de
Priority to JP51983297A priority patent/JP4354530B2/ja
Priority to BR9611821A priority patent/BR9611821A/pt
Publication of WO1997019557A1 publication Critical patent/WO1997019557A1/fr
Publication of WO1997019557B1 publication Critical patent/WO1997019557B1/fr

Links

Abstract

L'invention concerne un système et un procédé de commande de fréquences pour minimiser les dérives de fréquences dans les terminaux d'abonnés, dans un système point à multipoint. Ce système permet d'utiliser des oscillateurs à faibles coûts (5) dans les terminaux d'abonnés en mesurant le décalage de fréquence (9) du récepteur du terminal d'abonnés pour estimer la dérive de la fréquence de son oscillateur qui est, ensuite, utilisée pour corriger la fréquence de l'émetteur du terminal d'abonné (12). En outre, ce système utilise la rétroaction d'une correction de fréquence provenant de la station de base à destination de l'abonné.
PCT/US1996/018495 1995-11-21 1996-11-19 Correction de la derive de frequence dans des terminaux d'abonnes WO1997019557A1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
AU17419/97A AU716711C (en) 1995-11-21 1996-11-19 Subscriber frequency control system and method in point-to-multipoint RF communication system
CA002237465A CA2237465C (fr) 1995-11-21 1996-11-19 Correction de la derive de frequence dans des terminaux d'abonnes
EP96945921A EP0862834B1 (fr) 1995-11-21 1996-11-19 Correction de la derive de frequence dans des terminaux d'abonnes
DE69636812T DE69636812T2 (de) 1995-11-21 1996-11-19 Frequenzabweichungskorrektur für teilnehmerendgeräte
JP51983297A JP4354530B2 (ja) 1995-11-21 1996-11-19 加入者端末における周波数ドリフト補正
BR9611821A BR9611821A (pt) 1995-11-21 1996-11-19 Correção de desvio de frequência em terminais de assinantes

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/599,406 1995-11-21
US08/599,406 US5794119A (en) 1995-11-21 1995-11-21 Subscriber frequency control system and method in point-to-multipoint RF communication system

Publications (2)

Publication Number Publication Date
WO1997019557A1 WO1997019557A1 (fr) 1997-05-29
WO1997019557B1 true WO1997019557B1 (fr) 1997-08-07

Family

ID=24399482

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US1996/018495 WO1997019557A1 (fr) 1995-11-21 1996-11-19 Correction de la derive de frequence dans des terminaux d'abonnes

Country Status (12)

Country Link
US (2) US5794119A (fr)
EP (1) EP0862834B1 (fr)
JP (1) JP4354530B2 (fr)
KR (1) KR100441240B1 (fr)
CN (1) CN1197376C (fr)
AT (1) ATE350858T1 (fr)
AU (1) AU716711C (fr)
BR (1) BR9611821A (fr)
CA (1) CA2237465C (fr)
DE (1) DE69636812T2 (fr)
MX (1) MX9804013A (fr)
WO (1) WO1997019557A1 (fr)

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