BE901232A - Systeme de radiocommunication. - Google Patents

Systeme de radiocommunication.

Info

Publication number
BE901232A
BE901232A BE2/60561A BE2060561A BE901232A BE 901232 A BE901232 A BE 901232A BE 2/60561 A BE2/60561 A BE 2/60561A BE 2060561 A BE2060561 A BE 2060561A BE 901232 A BE901232 A BE 901232A
Authority
BE
Belgium
Prior art keywords
binary data
data signals
base stations
radiocommunication system
mobile stations
Prior art date
Application number
BE2/60561A
Other languages
English (en)
Original Assignee
Itt Ind Belgium
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 Itt Ind Belgium filed Critical Itt Ind Belgium
Priority to BE2/60561A priority Critical patent/BE901232A/fr
Publication of BE901232A publication Critical patent/BE901232A/fr
Priority to NZ21429985A priority patent/NZ214299A/xx
Priority to GB08528828A priority patent/GB2168878B/en
Priority to AU50339/85A priority patent/AU581038B2/en
Priority to AU24159/88A priority patent/AU2415988A/en

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/20—Modulator circuits; Transmitter circuits
    • H04L27/2003—Modulator circuits; Transmitter circuits for continuous phase modulation
    • H04L27/2007—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained
    • H04L27/2014—Modulator circuits; Transmitter circuits for continuous phase modulation in which the phase change within each symbol period is constrained in which the phase changes in a piecewise linear manner during each symbol period, e.g. minimum shift keying, fast frequency shift keying
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
    • H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un système de radiocommunication pouvant transmettre des signaux de parole et de données binaires entre des stations mobiles et un central de télécommunication via une ou plusieurs stations de base. Les signaux de données binaires sont transmis comme signaux à commutation-à-glissement-de-fréquence (FSK) sous forme analogique et modulée entre les stations mobiles et les stations de base, et sous forme d'échantillonnée entre ces dernières et le central. Ce système est également muni d'un dispositif de sur-échantillonnage qui permet de réduire considérablement les erreurs de transmission des signaux de données binaires.
BE2/60561A 1984-12-07 1984-12-07 Systeme de radiocommunication. BE901232A (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
BE2/60561A BE901232A (fr) 1984-12-07 1984-12-07 Systeme de radiocommunication.
NZ21429985A NZ214299A (en) 1984-12-07 1985-11-22 Cellular radio exchange link: recovering binary fsk at exchange
GB08528828A GB2168878B (en) 1984-12-07 1985-11-22 Radio communication system
AU50339/85A AU581038B2 (en) 1984-12-07 1985-11-25 Radiocommunication system
AU24159/88A AU2415988A (en) 1984-12-07 1988-10-24 An fsk modulator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE2/60561A BE901232A (fr) 1984-12-07 1984-12-07 Systeme de radiocommunication.

Publications (1)

Publication Number Publication Date
BE901232A true BE901232A (fr) 1985-06-07

Family

ID=3865721

Family Applications (1)

Application Number Title Priority Date Filing Date
BE2/60561A BE901232A (fr) 1984-12-07 1984-12-07 Systeme de radiocommunication.

Country Status (4)

Country Link
AU (2) AU581038B2 (fr)
BE (1) BE901232A (fr)
GB (1) GB2168878B (fr)
NZ (1) NZ214299A (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NZ243007A (en) * 1991-06-19 1995-02-24 Ericsson Telefon Ab L M Radio telephony: digital speech codec provided at regional stations for analog transmissions
DE69522468T2 (de) * 1994-11-30 2002-04-18 Telefonaktiebolaget Lm Ericsson, Stockholm Funkkommunikationssystem

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4412339A (en) * 1981-09-24 1983-10-25 Advanced Micro Devices, Inc. Zero-crossing interpolator to reduce isochronous distortion in a digital FSK modem
DE3223345A1 (de) * 1982-06-23 1984-01-05 Philips Patentverwaltung Gmbh, 2000 Hamburg Verfahren und anordnung zum demodulieren eines frequenzmodulierten eingangssignals
EP0146652B1 (fr) * 1983-12-24 1987-09-02 Deutsche ITT Industries GmbH Circuit numérique de démodulation des signaux modulés en fréquence numérisés

Also Published As

Publication number Publication date
GB2168878A (en) 1986-06-25
AU5033985A (en) 1986-06-12
AU581038B2 (en) 1989-02-09
NZ214299A (en) 1988-09-29
AU2415988A (en) 1989-01-27
GB8528828D0 (en) 1985-12-24
GB2168878B (en) 1989-02-01

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Legal Events

Date Code Title Description
CH Change of patent owner

Owner name: *BELL TELEPHONE MFG CY N.V.

Effective date: 19841207

RE Patent lapsed

Owner name: ALCATEL BEL

Effective date: 19991231