BE850923A - Appareil pour la correction de donnees codees par modulation de phase en quadrature differentielle - Google Patents

Appareil pour la correction de donnees codees par modulation de phase en quadrature differentielle

Info

Publication number: BE850923A
Authority: BE; Belgium
Prior art keywords: correction; encoded data; phase modulation; quadrature phase; differential quadrature
Prior art date: 1976-03-01

Application number

BE174521A

Other languages

English (en)

Original Assignee

Ibm

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.)

1976-03-01

Filing date

1977-01-31

Publication date

1977-05-16

1977-01-31 Application filed by Ibm filed Critical Ibm

1977-05-16 Publication of BE850923A publication Critical patent/BE850923A/fr

Links

Classifications

- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes

Landscapes

Engineering & Computer Science (AREA)
Computer Networks & Wireless Communication (AREA)
Signal Processing (AREA)
Error Detection And Correction (AREA)
Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Detection And Prevention Of Errors In Transmission (AREA)

BE174521A 1976-03-01 1977-01-31 Appareil pour la correction de donnees codees par modulation de phase en quadrature differentielle BE850923A (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
US05/662,493 US4035767A (en)	1976-03-01	1976-03-01	Error correction code and apparatus for the correction of differentially encoded quadrature phase shift keyed data (DQPSK)

Publications (1)

Publication Number	Publication Date
BE850923A true BE850923A (fr)	1977-05-16

Family

ID=24657947

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
BE174521A BE850923A (fr)	1976-03-01	1977-01-31	Appareil pour la correction de donnees codees par modulation de phase en quadrature differentielle

Country Status (14)

Country	Link
US (1)	US4035767A (fr)
JP (1)	JPS52106212A (fr)
AU (1)	AU504031B2 (fr)
BE (1)	BE850923A (fr)
BR (1)	BR7701260A (fr)
CA (1)	CA1068410A (fr)
DE (1)	DE2704627C3 (fr)
ES (1)	ES456335A1 (fr)
FR (1)	FR2343374A1 (fr)
GB (1)	GB1571214A (fr)
IT (1)	IT1118015B (fr)
NL (1)	NL7702107A (fr)
SE (1)	SE409270B (fr)
ZA (1)	ZA77659B (fr)

Families Citing this family (21)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
CA1081364A (fr) *	1976-09-28	1980-07-08	Shuichi Samejima	Systeme de detection differentielle a correction d'erreur non redondante
CA1106067A (fr) *	1977-07-19	1981-07-28	Katsuhiro Nakamura	Traduction non-disponible
JPS5625849A (en) *	1979-08-10	1981-03-12	Hitachi Ltd	Coding system
NZ198844A (en) *	1980-11-14	1984-05-31	Plessey Overseas	Digital information transmission: two dimensional code
US4538284A (en) *	1981-03-25	1985-08-27	Ese Limited	Signal structures with data encoding/decoding for QCM modulations
NL8102595A (nl)	1981-05-27	1982-12-16	Philips Nv	Ontvanger voor hoekgemoduleerde draaggolfsignalen.
US4425666A (en)	1982-01-29	1984-01-10	Motorola Inc.	Data encoding and decoding communication system for three frequency FSK modulation and method therefor
CA1191905A (fr) *	1982-06-30	1985-08-13	Canadian Patents And Development Limited/Societe Canadienne Des Brevets Et D'exploitation Limitee	Modem a spectre etendu
US4530094A (en) *	1982-09-28	1985-07-16	Ael Microtel, Limited	Coding for odd error multiplication in digital systems with differential coding
CA1212437A (fr) *	1983-03-04	1986-10-07	Radyne Corporation	Systeme de transmission de donnees avec codage des donnees a correction des erreurs
US4583236A (en) *	1983-11-04	1986-04-15	Racal Data Communications Inc.	Modified absolute phase detector
US4601044A (en) *	1983-11-04	1986-07-15	Racal Data Communications Inc.	Carrier-phase adjustment using absolute phase detector
CA1225746A (fr) *	1984-03-30	1987-08-18	Hirohisa Shishikura	Dispositif de correction d'erreurs dans les codes cycliques d'ensemble de difference pour systeme teletex
CA1223076A (fr) *	1984-03-30	1987-06-16	Hirohisa Shishikura	Dispositif correcteur d'erreur sur systeme de teletexte
WO1986000185A1 (fr) *	1984-06-09	1986-01-03	Devon County Council	Procede et appareil de communication de donnees
US5117427A (en) *	1988-03-03	1992-05-26	Mitsubishi Denki Kabushiki Kaisha	Communication system with concatenated coding error correction
US5023889A (en) *	1988-05-31	1991-06-11	California Institute Of Technology	Trellis coded multilevel DPSK system with doppler correction for mobile satellite channels
US5550868A (en) *	1994-03-03	1996-08-27	Lucent Technologies Inc.	π/4-DQPSK delay spread detection and compensation apparatus and method
US7860191B2 (en)	2007-09-07	2010-12-28	Qualcomm Incorporated	Optimal two-layer coherent demodulation for D-PSK (Differential Phase Shift Keying)
EP2403167B1 (fr) *	2010-06-30	2012-10-10	Alcatel Lucent	Procédé de transmission de données via un canal de transmission optique
TWI682387B (zh) *	2018-10-24	2020-01-11	新唐科技股份有限公司	多音調通訊系統、多音調訊號解調變裝置及其方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US3500320A (en) *	1968-12-24	1970-03-10	Codex Corp	Error correcting means for digital transmission systems
JPS5325443B2 (fr) *	1972-12-29	1978-07-27
US3988677A (en) *	1975-06-23	1976-10-26	Nasa	Space communication system for compressed data with a concatenated Reed-Solomon-Viterbi coding channel

1976
- 1976-03-01 US US05/662,493 patent/US4035767A/en not_active Expired - Lifetime
1977
- 1977-01-18 FR FR7702066A patent/FR2343374A1/fr active Granted
- 1977-01-31 BE BE174521A patent/BE850923A/fr not_active IP Right Cessation
- 1977-02-04 GB GB4597/77A patent/GB1571214A/en not_active Expired
- 1977-02-04 ZA ZA00770659A patent/ZA77659B/xx unknown
- 1977-02-04 DE DE2704627A patent/DE2704627C3/de not_active Expired
- 1977-02-15 SE SE7701654A patent/SE409270B/xx not_active IP Right Cessation
- 1977-02-21 CA CA272,260A patent/CA1068410A/fr not_active Expired
- 1977-02-25 IT IT20668/77A patent/IT1118015B/it active
- 1977-02-25 JP JP1940777A patent/JPS52106212A/ja active Granted
- 1977-02-26 ES ES456335A patent/ES456335A1/es not_active Expired
- 1977-02-28 NL NL7702107A patent/NL7702107A/xx not_active Application Discontinuation
- 1977-03-01 BR BR7701260A patent/BR7701260A/pt unknown
- 1977-03-04 AU AU22957/77A patent/AU504031B2/en not_active Expired

Also Published As

Publication number	Publication date
DE2704627A1 (de)	1977-09-08
ZA77659B (en)	1978-09-27
JPS52106212A (en)	1977-09-06
AU2295777A (en)	1978-09-07
BR7701260A (pt)	1977-10-18
FR2343374B1 (fr)	1978-11-03
SE7701654L (sv)	1977-09-02
NL7702107A (nl)	1977-09-05
DE2704627B2 (de)	1978-10-19
ES456335A1 (es)	1978-01-16
DE2704627C3 (de)	1979-06-21
GB1571214A (en)	1980-07-09
AU504031B2 (en)	1979-09-27
US4035767A (en)	1977-07-12
FR2343374A1 (fr)	1977-09-30
CA1068410A (fr)	1979-12-18
JPS5551371B2 (fr)	1980-12-24
SE409270B (sv)	1979-08-06
IT1118015B (it)	1986-02-24

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Legal Events

Date

Code

Title

Description

1993-07-31

RE

Patent lapsed

Owner name: INTERNATIONAL BUSINESS MACHINES CORP.

Effective date: 19930131