DE3787581D1 - Demodulator fuer 8-stufige phasenumtastung. - Google Patents
Demodulator fuer 8-stufige phasenumtastung.Info
- Publication number
- DE3787581D1 DE3787581D1 DE87109863T DE3787581T DE3787581D1 DE 3787581 D1 DE3787581 D1 DE 3787581D1 DE 87109863 T DE87109863 T DE 87109863T DE 3787581 T DE3787581 T DE 3787581T DE 3787581 D1 DE3787581 D1 DE 3787581D1
- Authority
- DE
- Germany
- Prior art keywords
- demodulator
- phase shifting
- step phase
- shifting
- phase
- 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 - Lifetime
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/01—Equalisers
-
- 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
- H04L27/227—Demodulator circuits; Receiver circuits using coherent demodulation
- H04L27/2271—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals
- H04L27/2273—Demodulator circuits; Receiver circuits using coherent demodulation wherein the carrier recovery circuit uses only the demodulated signals associated with quadrature demodulation, e.g. Costas loop
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0024—Carrier regulation at the receiver end
- H04L2027/0026—Correction of carrier offset
- H04L2027/0038—Correction of carrier offset using an equaliser
- H04L2027/0042—Correction of carrier offset using an equaliser the equaliser providing the offset correction per se
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0071—Control of loops
- H04L2027/0073—Detection of synchronisation state
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0014—Carrier regulation
- H04L2027/0044—Control loops for carrier regulation
- H04L2027/0071—Control of loops
- H04L2027/0079—Switching between loops
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61161376A JPH0640628B2 (ja) | 1986-07-09 | 1986-07-09 | 8相位相復調方式 |
JP3763287A JPH0644772B2 (ja) | 1987-02-20 | 1987-02-20 | 8相位相復調方式 |
Publications (2)
Publication Number | Publication Date |
---|---|
DE3787581D1 true DE3787581D1 (de) | 1993-11-04 |
DE3787581T2 DE3787581T2 (de) | 1994-04-28 |
Family
ID=26376764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE87109863T Expired - Lifetime DE3787581T2 (de) | 1986-07-09 | 1987-07-08 | Demodulator für 8-stufige Phasenumtastung. |
Country Status (5)
Country | Link |
---|---|
US (1) | US4803438A (de) |
EP (1) | EP0252500B1 (de) |
AU (1) | AU588201B2 (de) |
CA (1) | CA1287383C (de) |
DE (1) | DE3787581T2 (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4856030A (en) * | 1988-07-20 | 1989-08-08 | Itt Defense Communications | Apparatus and methods of locking a receiving modem to a transmitting modem employing a burst signal |
FR2721778B1 (fr) * | 1994-06-23 | 1996-09-06 | France Telecom | Procédé d'estimation d'une erreur de phase résiduelle sur les échantillons d'un signal numérique démodulé, et procédé de correction correspondant. |
US5583413A (en) * | 1994-09-06 | 1996-12-10 | Cruising Equipment, Inc. | Power conversion equipment monitor/controller method and apparatus |
FR2725097B1 (fr) * | 1994-09-23 | 1997-01-17 | France Telecom | Procede et dispositif d'evaluation numerique de la phase d'une porteuse modulee |
US5999349A (en) * | 1996-12-30 | 1999-12-07 | Daewoo Electronics Co., Ltd. | Waveform equalization apparatus |
FR2764158B1 (fr) | 1997-06-03 | 1999-08-20 | Texas Instruments France | Procede et dispositif d'estimation du decalage de frequence dans un signal recu par un demodulateur de telephone mobile |
US6760371B1 (en) * | 2000-03-22 | 2004-07-06 | The Boeing Company | Method and apparatus implementation of a zero forcing equalizer |
US7660344B2 (en) * | 2002-06-28 | 2010-02-09 | Bwa Technology, Inc. | AGC fine-tuning by the adaptive time domain equalizer |
US8509355B2 (en) * | 2008-06-30 | 2013-08-13 | Medtronic, Inc. | Method and apparatus for low power simultaneous frequency, automatic gain control and timing acquisition in radio receivers |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4540948A (en) * | 1982-09-14 | 1985-09-10 | Nec Corporation | 8-Phase phase-shift keying demodulator |
JPS5962228A (ja) * | 1982-10-01 | 1984-04-09 | Nec Corp | 自動等化器 |
CA1238368A (en) * | 1983-10-14 | 1988-06-21 | Takayuki Ozaki | Digital radio receiving apparatus |
CA1282127C (en) * | 1985-06-29 | 1991-03-26 | Nec Corporation | Digital demodulation system |
JPS6387828A (ja) * | 1986-09-30 | 1988-04-19 | Nec Corp | デイジタル復調システム |
-
1987
- 1987-07-08 CA CA000541598A patent/CA1287383C/en not_active Expired - Lifetime
- 1987-07-08 US US07/071,108 patent/US4803438A/en not_active Expired - Lifetime
- 1987-07-08 EP EP87109863A patent/EP0252500B1/de not_active Expired - Lifetime
- 1987-07-08 DE DE87109863T patent/DE3787581T2/de not_active Expired - Lifetime
- 1987-07-08 AU AU75341/87A patent/AU588201B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
EP0252500A2 (de) | 1988-01-13 |
EP0252500A3 (en) | 1989-11-23 |
CA1287383C (en) | 1991-08-06 |
US4803438A (en) | 1989-02-07 |
AU588201B2 (en) | 1989-09-07 |
EP0252500B1 (de) | 1993-09-29 |
AU7534187A (en) | 1988-01-14 |
DE3787581T2 (de) | 1994-04-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |