DE69731260D1 - Verfahren zur digitalen Differenzialdemodulation - Google Patents
Verfahren zur digitalen DifferenzialdemodulationInfo
- Publication number
- DE69731260D1 DE69731260D1 DE69731260T DE69731260T DE69731260D1 DE 69731260 D1 DE69731260 D1 DE 69731260D1 DE 69731260 T DE69731260 T DE 69731260T DE 69731260 T DE69731260 T DE 69731260T DE 69731260 D1 DE69731260 D1 DE 69731260D1
- Authority
- DE
- Germany
- Prior art keywords
- demodulation method
- digital differential
- differential demodulation
- digital
- differential
- 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 - Fee Related
Links
Classifications
-
- 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
- H04B1/7073—Synchronisation aspects
- H04B1/7075—Synchronisation aspects with code phase acquisition
- H04B1/70755—Setting of lock conditions, e.g. threshold
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9608866A FR2751499B1 (fr) | 1996-07-16 | 1996-07-16 | Procede de demodulation differentielle numerique |
FR9608866 | 1996-07-16 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69731260D1 true DE69731260D1 (de) | 2004-11-25 |
DE69731260T2 DE69731260T2 (de) | 2005-11-17 |
Family
ID=9494089
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69731260T Expired - Fee Related DE69731260T2 (de) | 1996-07-16 | 1997-07-11 | Verfahren zur digitalen Differenzialdemodulation |
Country Status (4)
Country | Link |
---|---|
US (1) | US5960045A (de) |
EP (1) | EP0820157B1 (de) |
DE (1) | DE69731260T2 (de) |
FR (1) | FR2751499B1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6539050B1 (en) | 1997-06-26 | 2003-03-25 | Hughes Electronics Corporation | Method for transmitting wideband signals via a communication system adapted for narrow-band signal transmission |
US6510147B1 (en) | 1997-07-15 | 2003-01-21 | Hughes Electronics Corporation | Method and apparatus for orthogonally overlaying variable chip rate spread spectrum signals |
US6396822B1 (en) * | 1997-07-15 | 2002-05-28 | Hughes Electronics Corporation | Method and apparatus for encoding data for transmission in a communication system |
US6185248B1 (en) * | 1998-03-12 | 2001-02-06 | Northrop Grumman Corporation | Wideband digital microwave receiver |
FR2794586B1 (fr) | 1999-06-02 | 2001-08-03 | Commissariat Energie Atomique | Procede de traitement d'une reponse impulsionnelle avec seuil adaptatif et recepteur correspondant |
US6115406A (en) | 1999-09-10 | 2000-09-05 | Interdigital Technology Corporation | Transmission using an antenna array in a CDMA communication system |
US6278726B1 (en) | 1999-09-10 | 2001-08-21 | Interdigital Technology Corporation | Interference cancellation in a spread spectrum communication system |
US20040110508A1 (en) * | 2002-09-20 | 2004-06-10 | Jacobus Haartsen | Methods and electronic devices for wireless ad-hoc network communications using receiver determined channels and transmitted reference signals |
KR100649678B1 (ko) | 2005-07-15 | 2006-11-27 | 삼성전기주식회사 | 가중치를 이용한 다중 차동 복조기 |
KR100759514B1 (ko) | 2006-07-10 | 2007-09-18 | 삼성전기주식회사 | 무선 사설망 복조기 및 복조방법 |
US9112754B2 (en) | 2013-10-08 | 2015-08-18 | Freescale Semiconductor, Inc. | Techniques for generating bit log-likelihood ratios in communication systems using differential modulation |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4969159A (en) * | 1989-03-22 | 1990-11-06 | Harris Corporation | Spread spectrum communication system employing composite spreading codes with matched filter demodulator |
GB2233860B (en) * | 1989-07-13 | 1993-10-27 | Stc Plc | Communications systems |
US5077753A (en) * | 1990-04-09 | 1991-12-31 | Proxim, Inc. | Radio communication system using spread spectrum techniques |
US5381446A (en) * | 1993-06-25 | 1995-01-10 | Digital Wireless Corp. | Digital implementation of spread spectrum communications system |
US5754599A (en) * | 1996-01-04 | 1998-05-19 | Motorola, Inc. | Method and apparatus for coherent channel estimation in a communication system |
-
1996
- 1996-07-16 FR FR9608866A patent/FR2751499B1/fr not_active Expired - Fee Related
-
1997
- 1997-07-10 US US08/891,031 patent/US5960045A/en not_active Expired - Fee Related
- 1997-07-11 DE DE69731260T patent/DE69731260T2/de not_active Expired - Fee Related
- 1997-07-11 EP EP97401680A patent/EP0820157B1/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
FR2751499A1 (fr) | 1998-01-23 |
EP0820157B1 (de) | 2004-10-20 |
US5960045A (en) | 1999-09-28 |
EP0820157A3 (de) | 1998-01-28 |
DE69731260T2 (de) | 2005-11-17 |
EP0820157A2 (de) | 1998-01-21 |
FR2751499B1 (fr) | 1998-08-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition | ||
8339 | Ceased/non-payment of the annual fee |