BE901232A - RADIOCOMMUNICATION SYSTEM. - Google Patents
RADIOCOMMUNICATION SYSTEM.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
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.A radiocommunication system capable of transmitting speech and binary data signals between mobile stations and a telecommunications center via one or more base stations. Binary data signals are transmitted as frequency slip-switching (FSK) signals in analog and modulated form between mobile stations and base stations, and in sampled form between them and the central office. This system is also provided with an oversampling device which considerably reduces transmission errors of binary data signals.
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BE2/60561A BE901232A (en) | 1984-12-07 | 1984-12-07 | RADIOCOMMUNICATION SYSTEM. |
GB08528828A GB2168878B (en) | 1984-12-07 | 1985-11-22 | Radio communication system |
NZ21429985A NZ214299A (en) | 1984-12-07 | 1985-11-22 | Cellular radio exchange link: recovering binary fsk at exchange |
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 (en) | 1984-12-07 | 1984-12-07 | RADIOCOMMUNICATION SYSTEM. |
Publications (1)
Publication Number | Publication Date |
---|---|
BE901232A true BE901232A (en) | 1985-06-07 |
Family
ID=3865721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
BE2/60561A BE901232A (en) | 1984-12-07 | 1984-12-07 | RADIOCOMMUNICATION SYSTEM. |
Country Status (4)
Country | Link |
---|---|
AU (2) | AU581038B2 (en) |
BE (1) | BE901232A (en) |
GB (1) | GB2168878B (en) |
NZ (1) | NZ214299A (en) |
Families Citing this family (1)
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 |
Family Cites Families (3)
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 (en) * | 1982-06-23 | 1984-01-05 | Philips Patentverwaltung Gmbh, 2000 Hamburg | METHOD AND ARRANGEMENT FOR DEMODULATING A FREQUENCY-MODULATED INPUT SIGNAL |
EP0146652B1 (en) * | 1983-12-24 | 1987-09-02 | Deutsche ITT Industries GmbH | A digital demodulator for digitized frequency-modulated signals |
-
1984
- 1984-12-07 BE BE2/60561A patent/BE901232A/en not_active IP Right Cessation
-
1985
- 1985-11-22 NZ NZ21429985A patent/NZ214299A/en unknown
- 1985-11-22 GB GB08528828A patent/GB2168878B/en not_active Expired
- 1985-11-25 AU AU50339/85A patent/AU581038B2/en not_active Ceased
-
1988
- 1988-10-24 AU AU24159/88A patent/AU2415988A/en not_active Withdrawn
Also Published As
Publication number | Publication date |
---|---|
GB2168878A (en) | 1986-06-25 |
NZ214299A (en) | 1988-09-29 |
GB8528828D0 (en) | 1985-12-24 |
AU2415988A (en) | 1989-01-27 |
AU581038B2 (en) | 1989-02-09 |
AU5033985A (en) | 1986-06-12 |
GB2168878B (en) | 1989-02-01 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CA2071490A1 (en) | Satellite based acknowledge-back paging system | |
RU97122267A (en) | METHOD FOR PROCESSING COMMUNICATION SIGNALS IN A SUBSCRIBER ITEM OF A WIRELESS TELECOMMUNICATION SYSTEM | |
EP0844796A3 (en) | Communication method | |
MY114196A (en) | Communication system | |
EP0353759A3 (en) | Mobile radio data communication system and method | |
EP0700170A3 (en) | A method and apparatus for spread spectrum code pulse position modulation | |
EP1633154A3 (en) | Method and apparatus for providing high speed data communication in a cellular environment | |
TW325609B (en) | Multiple-modulation communication system | |
EP0475464A3 (en) | Block coded modulation system | |
CA2325401A1 (en) | Cellular simultaneous voice and data transmission including digital simultaneous voice and data (dsvd) modem | |
EP1617695A3 (en) | Indicating enciphering of data transmission between a mobile communication network and a mobile station | |
MY111041A (en) | Subscriber unit for wireless digital subscriber communication system. | |
KR910013766A (en) | Commercial satellite communication system | |
CA2027364A1 (en) | Varying bandwidth digital signal detector | |
KR950016120A (en) | Frequency Division Multiple Access Communication Device and Method | |
IT8621958A0 (en) | PROCEDURE FOR TRANSMITTING TEXT MESSAGES ON A SUB CARRIER ASSOCIATED WITH A RADIO CARRIER FREQUENCY. | |
EP0863682A4 (en) | Mobile communication system | |
MY124287A (en) | Cordless telephone system | |
CA2212420A1 (en) | Method of mobile communication using orthogonal alert codes | |
ATE95357T1 (en) | COMBINED VOICE INTERPOLATION AND ADAPTIVE DIFFERENTIAL PULSE CODE MODULATION SYSTEM. | |
DE69839849D1 (en) | SYSTEM IMPROVEMENT IN A TELECOMMUNICATIONS NETWORK | |
NO905077D0 (en) | COMMUNICATION SYSTEM FOR MIXED MODULATION LEVEL. | |
BE901232A (en) | RADIOCOMMUNICATION SYSTEM. | |
EP0699010A3 (en) | Data communication system using spectral overlay | |
SE9603131L (en) | Digital mobile data communication device |
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 |