ZA817174B - Improvements in or relating to data transmission systems - Google Patents
Improvements in or relating to data transmission systemsInfo
- Publication number
- ZA817174B ZA817174B ZA817174A ZA817174A ZA817174B ZA 817174 B ZA817174 B ZA 817174B ZA 817174 A ZA817174 A ZA 817174A ZA 817174 A ZA817174 A ZA 817174A ZA 817174 B ZA817174 B ZA 817174B
- Authority
- ZA
- South Africa
- Prior art keywords
- relating
- data transmission
- transmission systems
- vectors
- expanded
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/38—Synchronous or start-stop systems, e.g. for Baudot code
- H04L25/40—Transmitting circuits; Receiving circuits
- H04L25/49—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems
- H04L25/4917—Transmitting circuits; Receiving circuits using code conversion at the transmitter; using predistortion; using insertion of idle bits for obtaining a desired frequency spectrum; using three or more amplitude levels ; Baseband coding techniques specific to data transmission systems using multilevel codes
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03203—Trellis search techniques
- H04L25/03229—Trellis search techniques with state-reduction using grouping of states
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L25/03178—Arrangements involving sequence estimation techniques
- H04L25/03248—Arrangements for operating in conjunction with other apparatus
- H04L25/03299—Arrangements for operating in conjunction with other apparatus with noise-whitening circuitry
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Probability & Statistics with Applications (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Theoretical Computer Science (AREA)
- Power Engineering (AREA)
- Error Detection And Correction (AREA)
- Filters That Use Time-Delay Elements (AREA)
- Radio Relay Systems (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
- Photoreceptors In Electrophotography (AREA)
- Communication Control (AREA)
- Dc Digital Transmission (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Investigating Or Analysing Biological Materials (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Monitoring And Testing Of Transmission In General (AREA)
- Holo Graphy (AREA)
- Optical Communication System (AREA)
- Surgical Instruments (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8034682A GB2087198B (en) | 1980-10-28 | 1980-10-28 | Data decoding |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA817174B true ZA817174B (en) | 1982-10-27 |
Family
ID=10516930
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA817174A ZA817174B (en) | 1980-10-28 | 1981-10-16 | Improvements in or relating to data transmission systems |
Country Status (14)
Country | Link |
---|---|
US (1) | US4484338A (fr) |
EP (1) | EP0050930B1 (fr) |
JP (1) | JPS57127349A (fr) |
AT (1) | ATE12866T1 (fr) |
AU (1) | AU541651B2 (fr) |
CA (1) | CA1202726A (fr) |
DE (1) | DE3170013D1 (fr) |
DK (1) | DK476981A (fr) |
ES (1) | ES8300232A1 (fr) |
GB (1) | GB2087198B (fr) |
IE (1) | IE52427B1 (fr) |
NO (1) | NO156229C (fr) |
NZ (1) | NZ198717A (fr) |
ZA (1) | ZA817174B (fr) |
Families Citing this family (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4527279A (en) * | 1982-07-12 | 1985-07-02 | Kokusai Denshin Denwa Co. | Synchronization circuit for a Viterbi decoder |
US4578800A (en) * | 1982-07-12 | 1986-03-25 | Yutaka Yasuda | Synchronization circuit for a Viterbi decoder |
US4646305A (en) * | 1983-09-26 | 1987-02-24 | Case Communications, Inc. | High speed data modem using multilevel encoding |
US4756007A (en) * | 1984-03-08 | 1988-07-05 | Codex Corporation | Adaptive communication rate modem |
US4631735A (en) * | 1984-12-28 | 1986-12-23 | Codex Corporation | Coded modulation system with feedback |
GB8609711D0 (en) * | 1986-04-21 | 1986-05-29 | Clark A P | Channel estimation & detection |
US4945549A (en) * | 1986-11-13 | 1990-07-31 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Trellis coded modulation for transmission over fading mobile satellite channel |
EP0293620A1 (fr) * | 1987-05-25 | 1988-12-07 | BBC Brown Boveri AG | Procédé de transmission de signaux |
US4885757A (en) * | 1987-06-01 | 1989-12-05 | Texas Instruments Incorporated | Digital adaptive receiver employing maximum-likelihood sequence estimation with neural networks |
US5271042A (en) * | 1989-10-13 | 1993-12-14 | Motorola, Inc. | Soft decision decoding with channel equalization |
KR930004862B1 (ko) * | 1990-12-17 | 1993-06-09 | 삼성전자 주식회사 | 상태 평가량 기억장치 |
US5142551A (en) * | 1991-02-28 | 1992-08-25 | Motorola, Inc. | Signal weighting system for digital receiver |
GB2267632B (en) * | 1991-10-21 | 1995-04-19 | Motorola Inc | System and method for calculating a state transition metric in a viterbi equalizer |
DE4224214C2 (de) * | 1992-07-22 | 1995-02-09 | Deutsche Forsch Luft Raumfahrt | Verfahren zur quellengesteuerten Kanaldecodierung durch Erweiterung des Viterbi-Algorithmus |
US5363412A (en) * | 1992-12-28 | 1994-11-08 | Motorola, Inc. | Method and apparatus of adaptive maximum likelihood sequence estimation using filtered correlation synchronization |
JP3275779B2 (ja) * | 1997-06-16 | 2002-04-22 | 日本電気株式会社 | 遅延判定帰還型系列推定受信装置 |
FR2783120B1 (fr) * | 1998-09-04 | 2000-11-24 | Nortel Matra Cellular | Procede d'egalisation numerique, et recepteur de radiocommunication mettant en oeuvre un tel procede |
US6347125B1 (en) | 1999-01-11 | 2002-02-12 | Ericsson Inc. | Reduced complexity demodulator for multi-bit symbols |
US6999510B2 (en) * | 2003-04-18 | 2006-02-14 | Optichron, Inc. | Nonlinear inversion |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4130818A (en) * | 1977-04-21 | 1978-12-19 | Communications Satellite Corporation | Analog threshold decoding |
US4171516A (en) * | 1977-11-23 | 1979-10-16 | General Electric Company | Tone phase shift detector |
US4240156A (en) * | 1979-03-29 | 1980-12-16 | Doland George D | Concatenated error correcting system |
US4293953A (en) * | 1979-12-28 | 1981-10-06 | The United States Of America As Represented By The Secretary Of The Army | Bi-orthogonal PCM communications system employing multiplexed noise codes |
-
1980
- 1980-10-28 GB GB8034682A patent/GB2087198B/en not_active Expired
-
1981
- 1981-10-08 AT AT81304667T patent/ATE12866T1/de not_active IP Right Cessation
- 1981-10-08 DE DE8181304667T patent/DE3170013D1/de not_active Expired
- 1981-10-08 EP EP81304667A patent/EP0050930B1/fr not_active Expired
- 1981-10-16 ZA ZA817174A patent/ZA817174B/xx unknown
- 1981-10-20 NO NO813533A patent/NO156229C/no unknown
- 1981-10-20 NZ NZ198717A patent/NZ198717A/en unknown
- 1981-10-22 CA CA000388556A patent/CA1202726A/fr not_active Expired
- 1981-10-26 US US06/314,974 patent/US4484338A/en not_active Expired - Fee Related
- 1981-10-27 JP JP56171958A patent/JPS57127349A/ja active Pending
- 1981-10-27 IE IE2507/81A patent/IE52427B1/en unknown
- 1981-10-27 AU AU76856/81A patent/AU541651B2/en not_active Ceased
- 1981-10-27 ES ES506607A patent/ES8300232A1/es not_active Expired
- 1981-10-28 DK DK476981A patent/DK476981A/da not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
NO813533L (no) | 1982-04-29 |
ATE12866T1 (de) | 1985-05-15 |
AU7685681A (en) | 1982-05-06 |
DK476981A (da) | 1982-04-29 |
NZ198717A (en) | 1985-08-16 |
ES506607A0 (es) | 1982-10-01 |
EP0050930A1 (fr) | 1982-05-05 |
NO156229C (no) | 1987-08-19 |
ES8300232A1 (es) | 1982-10-01 |
NO156229B (no) | 1987-05-04 |
IE52427B1 (en) | 1987-10-28 |
AU541651B2 (en) | 1985-01-17 |
GB2087198B (en) | 1985-02-27 |
JPS57127349A (en) | 1982-08-07 |
EP0050930B1 (fr) | 1985-04-17 |
GB2087198A (en) | 1982-05-19 |
DE3170013D1 (en) | 1985-05-23 |
IE812507L (en) | 1982-04-28 |
US4484338A (en) | 1984-11-20 |
CA1202726A (fr) | 1986-04-01 |
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