CA1232025A - Frequency control for point to multipoint radio - Google Patents

Frequency control for point to multipoint radio

Info

Publication number
CA1232025A
CA1232025A CA000462309A CA462309A CA1232025A CA 1232025 A CA1232025 A CA 1232025A CA 000462309 A CA000462309 A CA 000462309A CA 462309 A CA462309 A CA 462309A CA 1232025 A CA1232025 A CA 1232025A
Authority
CA
Canada
Prior art keywords
frequency
node
outstation
signal
error
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
Application number
CA000462309A
Other languages
English (en)
French (fr)
Inventor
Michael T.H. Hewitt
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.)
British Telecommunications PLC
Original Assignee
British Telecommunications PLC
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 British Telecommunications PLC filed Critical British Telecommunications PLC
Application granted granted Critical
Publication of CA1232025A publication Critical patent/CA1232025A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—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
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
    • H04B1/40—Circuits
    • H04B1/50—Circuits using different frequencies for the two directions of communication

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Small-Scale Networks (AREA)
CA000462309A 1983-09-07 1984-08-31 Frequency control for point to multipoint radio Expired CA1232025A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8323966 1983-09-07
GB838323966A GB8323966D0 (en) 1983-09-07 1983-09-07 Frequency control for point-to-multipoint radio

Publications (1)

Publication Number Publication Date
CA1232025A true CA1232025A (en) 1988-01-26

Family

ID=10548427

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000462309A Expired CA1232025A (en) 1983-09-07 1984-08-31 Frequency control for point to multipoint radio

Country Status (7)

Country Link
US (1) US4670889A (enExample)
EP (1) EP0138366B1 (enExample)
JP (1) JPS60150330A (enExample)
AT (1) ATE36104T1 (enExample)
CA (1) CA1232025A (enExample)
DE (1) DE3473105D1 (enExample)
GB (1) GB8323966D0 (enExample)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4817197A (en) * 1986-07-18 1989-03-28 Nippon Telegraph And Telephone Corporation Mobile communication apparatus
US5255291A (en) * 1988-11-14 1993-10-19 Stratacom, Inc. Microprocessor based packet isochronous clocking transmission system and method
US5249305A (en) * 1989-09-27 1993-09-28 Motorola, Inc. Radio frequency error detection and correction system
WO1991005410A1 (en) * 1989-09-27 1991-04-18 Motorola, Inc. Method and apparatus for adjusting the frequency of a two-way radio
US5168575A (en) * 1990-09-28 1992-12-01 Motorola, Inc. Demand driven wide-area radio system resource assignment method and apparatus
JP3269577B2 (ja) * 1991-10-02 2002-03-25 モトローラ・インコーポレイテッド ビット誤り率検出方法
US6006069A (en) * 1994-11-28 1999-12-21 Bosch Telecom Gmbh Point-to-multipoint communications system
US6112056A (en) 1995-06-07 2000-08-29 Cisco Systems, Inc. Low power, short range point-to-multipoint communications system
DE19613489C2 (de) * 1996-04-04 2001-09-27 Esw Extel Systems Wedel Ges Fu Verfahren zur Übertragung von bidirektionalen Daten zwischen der Zentrale und den Teilnehmern eines Gefechtsübungszentrums
DE19705395C2 (de) * 1997-02-13 1999-12-23 Mikom Gmbh Repeater
DE19737758A1 (de) * 1997-08-29 1999-03-04 Bosch Gmbh Robert Verfahren zum Einstellen der Sendeträgerfrequenz in einer Teilnehmerstation eines Punkt-zu-Mehrpunkt Funkübertragungssystem
US6240276B1 (en) * 1998-04-28 2001-05-29 Ericsson Inc. Compensating for errors in tuning frequency of a global positioning satellite (GPS) receiver
US6603958B1 (en) * 2000-02-09 2003-08-05 Nortel Networks Limited Method and apparatus for a carrier frequency control in a wireless communication system
US6947748B2 (en) 2000-12-15 2005-09-20 Adaptix, Inc. OFDMA with adaptive subcarrier-cluster configuration and selective loading
MXPA03005307A (es) * 2000-12-15 2004-12-02 Adaptix Inc Comunicaciones de multiportadores con asignacion de subportadora con base en grupos.
KR100742580B1 (ko) * 2002-10-30 2007-08-02 리서치 인 모션 리미티드 데이터 통신 서비스를 이용가능하게 하는 통신 네트워크를선택하는 방법 및 장치
US7573851B2 (en) * 2004-12-07 2009-08-11 Adaptix, Inc. Method and system for switching antenna and channel assignments in broadband wireless networks
KR101257066B1 (ko) * 2005-09-06 2013-04-22 한국전자통신연구원 직교 주파수 분할 다중화 셀룰러 시스템에서 셀 간 간섭완화를 위한 하향 링크의 자원 분할, 할당 방법 및 송수신방법

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3195047A (en) * 1961-12-29 1965-07-13 Bell Telephone Labor Inc Frequency modulation communication system having automatic frequency deviation adjustng means
GB1074824A (en) * 1965-03-05 1967-07-05 British Broadcasting Corp Improvements in and relating to the synchronising of periodic signals
BE754157A (fr) * 1969-07-31 1971-02-01 Siemens Ag Montage pour la compensation de composantes parasites de tension continue lors de la demodulation de signaux de donnees binaires
US3654395A (en) * 1969-10-15 1972-04-04 Communications Satellite Corp Synchronization of tdma space division satellite system
US4061979A (en) * 1975-10-20 1977-12-06 Digital Communications Corporation Phase locked loop with pre-set and squelch
US4231114A (en) * 1978-02-27 1980-10-28 Motorola, Inc. Synchronizing means for a two-way communication system
US4188582A (en) * 1978-04-10 1980-02-12 Motorola, Inc. Simulcast transmission system having phase-locked remote transmitters
NL7810171A (nl) * 1978-10-10 1980-04-14 Philips Nv Vaste post voor een systeem voor mobiele datacommuni- catie.
JPS57148432A (en) * 1981-03-09 1982-09-13 Nec Corp Frequency synchronization system
US4520508A (en) * 1982-12-21 1985-05-28 General Instrument Corporation Subscriber terminal for monitoring radio-frequency signal ingress into cable television systems

Also Published As

Publication number Publication date
EP0138366A2 (en) 1985-04-24
EP0138366A3 (en) 1985-06-19
GB8323966D0 (en) 1983-10-12
JPH0242255B2 (enExample) 1990-09-21
US4670889A (en) 1987-06-02
DE3473105D1 (en) 1988-09-01
EP0138366B1 (en) 1988-07-27
ATE36104T1 (de) 1988-08-15
JPS60150330A (ja) 1985-08-08

Similar Documents

Publication Publication Date Title
CA1232025A (en) Frequency control for point to multipoint radio
US5390185A (en) Transmission system for a combination of a main signal and an auxiliary signal
CA1110706A (en) Synchronizing means for a two-way communication system
US5066957A (en) Hybrid modulation satellite communication system
US5155483A (en) Channel switching system
US6031828A (en) Radio communication system
US4022988A (en) Fault locating apparatus for digital transmission system
JPH0795713B2 (ja) ラジオリンクの送信電力制御装置
EP0504905B1 (en) Carrier recovery control with sequential FEC sync detection and frame sync detection
US4689787A (en) Method of initially establishing burst acquisition in TDMA satellite communications system and arrangement therefor
EP0324420B1 (en) Transponder frequency offset compensation with recurrently assigned unique words
US4360926A (en) Digital phase-locked loop
CA1125404A (en) Method for generating a pseudo-signal in an error rate supervisory unit and circuit for carrying out the same
US5793250A (en) Phase demodulator selectively using a first or a second detector
US5497402A (en) Automatic frequency control device for satellite communications ground system
CA2166229C (en) Demodulator control system and a receiver capable of quickly acquiring a desired carrier wave
US4829588A (en) Automatic retransmission with pilot tone
US2798118A (en) System for pulse-code modulation
US4623998A (en) Communication network having gain adjustment function of a transmission amplifier of medium attachment unit
EP0935352B1 (en) Mobile satellite communication method and system capable of carrying out carrier activation with reliability of a communication path secured
EP0766895B1 (en) Detection of a low level marshalling sequence
JP3052518B2 (ja) バースト信号復調装置の復調制御方法
US4426711A (en) Process for the transmission of service signals for a digital radio beam, as well as transmitter and receiver for using such a process
CA1114904A (en) Narrow band communication system
EP0592041A1 (en) Transmission system for a main signal and an auxiliary signal

Legal Events

Date Code Title Description
MKEX Expiry