IT1277863B1 - Procedimento per regolare le frequenze di riferimento in un sistema di comunicazioni. - Google Patents

Procedimento per regolare le frequenze di riferimento in un sistema di comunicazioni.

Info

Publication number
IT1277863B1
IT1277863B1 IT95RM000335A ITRM950335A IT1277863B1 IT 1277863 B1 IT1277863 B1 IT 1277863B1 IT 95RM000335 A IT95RM000335 A IT 95RM000335A IT RM950335 A ITRM950335 A IT RM950335A IT 1277863 B1 IT1277863 B1 IT 1277863B1
Authority
IT
Italy
Prior art keywords
frequency
station
stations
communications system
accurate
Prior art date
Application number
IT95RM000335A
Other languages
English (en)
Inventor
Steven G Lee
Brian D Iehl
Omer Manya
Michael J Schellinger
Avello Robert F D
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of ITRM950335A0 publication Critical patent/ITRM950335A0/it
Publication of ITRM950335A1 publication Critical patent/ITRM950335A1/it
Application granted granted Critical
Publication of IT1277863B1 publication Critical patent/IT1277863B1/it

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03J—TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
    • H03J7/00—Automatic frequency control; Automatic scanning over a band of frequencies
    • H03J7/02—Automatic frequency control

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Transmitters (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Radio Relay Systems (AREA)

Abstract

Un procedimento in generale migliora la precisione in frequenza in un sistema per comunicazioni senza richiedere l'impiego di accurati riferimenti di frequenza in tutte le stazioni o tipi di stazioni. Un accurato riferimento di frequenza viene utilizzato in una delle stazioni oppure in uno dei tipi di stazioni. Le frequenze di riferimento delle stazioni restanti o dei restanti tipi di stazione possono essere regolate sulla base dell'accurata frequenza di riferimento in una delle stazioni. In particolare, un procedimento per regolare le frequenze di riferimento in un sistema per comunicazioni comprendente una stazione portatile, una stazione di base residenziale ed una stazione di base pubblica che genera una prima frequenza di riferimento è caratterizzato dalle operazioni di regolazione (512) di: una seconda frequenza di riferimento nella stazione portatile sulla base della prima frequenza di riferimento e di regolazione (514) di una terza frequenza di riferimento della stazione di base residenziale, sulla base della seconda frequenza di riferimento.
IT95RM000335A 1994-05-20 1995-05-19 Procedimento per regolare le frequenze di riferimento in un sistema di comunicazioni. IT1277863B1 (it)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/246,650 US5701589A (en) 1994-05-20 1994-05-20 Method for adjusting reference frequencies in a communication system

Publications (3)

Publication Number Publication Date
ITRM950335A0 ITRM950335A0 (it) 1995-05-19
ITRM950335A1 ITRM950335A1 (it) 1996-11-19
IT1277863B1 true IT1277863B1 (it) 1997-11-12

Family

ID=22931596

Family Applications (1)

Application Number Title Priority Date Filing Date
IT95RM000335A IT1277863B1 (it) 1994-05-20 1995-05-19 Procedimento per regolare le frequenze di riferimento in un sistema di comunicazioni.

Country Status (14)

Country Link
US (1) US5701589A (it)
JP (1) JP3197015B2 (it)
KR (1) KR100225765B1 (it)
CN (1) CN1074618C (it)
AU (1) AU2230595A (it)
DE (1) DE19580681C2 (it)
FR (1) FR2720212B1 (it)
GB (1) GB2295298B (it)
IT (1) IT1277863B1 (it)
MA (1) MA23555A1 (it)
MX (1) MX9600304A (it)
TW (1) TW260849B (it)
WO (1) WO1995032559A1 (it)
ZA (1) ZA953705B (it)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5926746A (en) * 1996-11-08 1999-07-20 Qualcomm Incorporated Frequency and other parameter adjustment using training channel
US6006106A (en) * 1996-12-31 1999-12-21 Ericsson Inc. Method for automatic transceiver selection in a mobile multiple RF transceiver apparatus
US6339696B1 (en) * 1999-11-05 2002-01-15 Magnadyne Corporation In-vehicle audio/video system
US8811369B2 (en) 2006-01-11 2014-08-19 Qualcomm Incorporated Methods and apparatus for supporting multiple communications modes of operation
CN101371603B (zh) 2006-01-11 2013-10-23 高通股份有限公司 无线对等网络中的无线设备发现
FI20075681A0 (fi) * 2007-09-28 2007-09-28 Nokia Corp Pääsynvalvonta tukiasemia varten
US8595501B2 (en) 2008-05-09 2013-11-26 Qualcomm Incorporated Network helper for authentication between a token and verifiers
CN101902240B (zh) * 2008-11-20 2013-03-20 南京熊猫电子股份有限公司 卫星通信便携站小型化结构的设置方法
JP6186008B2 (ja) * 2013-11-27 2017-08-23 株式会社日立産機システム 位置情報発信機のメンテナンス方法、および、それに用いる位置情報発信機

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4989230A (en) * 1988-09-23 1991-01-29 Motorola, Inc. Cellular cordless telephone
US5081705A (en) * 1989-06-29 1992-01-14 Rockwell International Corp. Communication system with external reference signal processing capability
US5163159A (en) * 1990-07-30 1992-11-10 Motorola, Inc. Dual mode automatic frequency control
US5077790A (en) * 1990-08-03 1991-12-31 Motorola, Inc. Secure over-the-air registration of cordless telephones
US5410588A (en) * 1991-04-03 1995-04-25 Kabushiki Kaisha Toshiba Mobile radio communications system having a supervising radio transmitting station for transmitting a reference synchronizing signal to a first and second base stations via a radio link
US5363376A (en) * 1993-07-30 1994-11-08 Bell Communications Research, Inc. Method and apparatus for synchronizing timing among radio ports in wireless communications systems

Also Published As

Publication number Publication date
JP3197015B2 (ja) 2001-08-13
CN1129049A (zh) 1996-08-14
ITRM950335A0 (it) 1995-05-19
DE19580681T1 (de) 1996-08-22
WO1995032559A1 (en) 1995-11-30
MX9600304A (es) 1998-11-30
ITRM950335A1 (it) 1996-11-19
US5701589A (en) 1997-12-23
FR2720212B1 (fr) 2000-01-21
GB2295298B (en) 1998-09-09
KR100225765B1 (en) 1999-10-15
JPH09500779A (ja) 1997-01-21
CN1074618C (zh) 2001-11-07
TW260849B (en) 1995-10-21
AU2230595A (en) 1995-12-18
FR2720212A1 (fr) 1995-11-24
ZA953705B (en) 1996-03-12
GB2295298A (en) 1996-05-22
DE19580681C2 (de) 2000-12-07
MA23555A1 (fr) 1995-12-31
GB9601044D0 (en) 1996-03-27

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Legal Events

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0001 Granted