JPS599668U - 搬送波同期装置 - Google Patents
搬送波同期装置Info
- Publication number
- JPS599668U JPS599668U JP1983001346U JP134683U JPS599668U JP S599668 U JPS599668 U JP S599668U JP 1983001346 U JP1983001346 U JP 1983001346U JP 134683 U JP134683 U JP 134683U JP S599668 U JPS599668 U JP S599668U
- Authority
- JP
- Japan
- Prior art keywords
- component
- phase
- seconds
- generate
- product
- 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.)
- Granted
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
- H04L27/22—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
- H04L2027/0028—Correction of carrier offset at passband only
-
- 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
- H04L2027/0053—Closed loops
- H04L2027/0057—Closed loops quadrature phase
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Radio Relay Systems (AREA)
- Stabilization Of Oscillater, Synchronisation, Frequency Synthesizers (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。
め要約のデータは記録されません。
Description
第1図はPSK変調技法を使用した公知のシステムのブ
ロック図、第2図は本考案の搬送波同期システムを組込
んだ同期PSK復調器のブロック図、第3図は4相PS
K変調の原理を示す直交座標グラフ、第4図は遅延装置
がない場合の動作を示す波形図、第5図は本考案に従っ
て遅延装置を付加した場合の波形図である。 24“I、24Q・・・・・・復調器、25・・・・・
・電圧制御発振器(vco)、26・・・・・・90°
位相シフタ、27I。 27Q・・・・・・低域通過フィルタ、281.28Q
・・・・・・リミッタ、291.29Q・・・・・・サ
ンプラ、30・・・・・・クロック信号線、jl・・・
・・・解読器、32I。 32Q・・・・・・遅延装置、33I、 33Q・・
・・・・アナログ乗算器、34・・・・・・アナログ合
計器、35・・・・・・アナログ積分器。
ロック図、第2図は本考案の搬送波同期システムを組込
んだ同期PSK復調器のブロック図、第3図は4相PS
K変調の原理を示す直交座標グラフ、第4図は遅延装置
がない場合の動作を示す波形図、第5図は本考案に従っ
て遅延装置を付加した場合の波形図である。 24“I、24Q・・・・・・復調器、25・・・・・
・電圧制御発振器(vco)、26・・・・・・90°
位相シフタ、27I。 27Q・・・・・・低域通過フィルタ、281.28Q
・・・・・・リミッタ、291.29Q・・・・・・サ
ンプラ、30・・・・・・クロック信号線、jl・・・
・・・解読器、32I。 32Q・・・・・・遅延装置、33I、 33Q・・
・・・・アナログ乗算器、34・・・・・・アナログ合
計器、35・・・・・・アナログ積分器。
Claims (1)
- 【実用新案登録請求の範囲】 調節可能な基準搬送波源を利用して受信信号の同期成分
及び直交成分を発生する4位相同期PSK復調器におい
て、 上記同相成分及び上記直交成分の符号を検出する符号検
出手段と、 信号周期をT秒として上記同相成分及び上記直交成分を
各T/2秒遅延させる遅延手段と、 ゛上記遅延手
段を通過した同相成分と上記符号検出手段で検出された
直交成分の符号とを乗算して第1の積を発生し、上記遅
延手段を通過した直′ 交成分と上記符号検出手
段で検出された同相成分の符号とを乗算して第2の積を
発生する乗算手段と、 上記第1及び第2の積の差に基いて上記基準搬送波源を
調節する手段とを具備する搬送波同期装置。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7632450 | 1976-10-18 | ||
FR7632450A FR2368184A1 (fr) | 1976-10-18 | 1976-10-18 | Systeme de synchronisation de porteuse pour demodulateur de phase coherent |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS599668U true JPS599668U (ja) | 1984-01-21 |
JPS5921567Y2 JPS5921567Y2 (ja) | 1984-06-26 |
Family
ID=9179281
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12412277A Pending JPS5386149A (en) | 1976-10-18 | 1977-10-18 | Carrier synchronizer |
JP1983001346U Expired JPS5921567Y2 (ja) | 1976-10-18 | 1983-01-11 | 搬送波同期装置 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12412277A Pending JPS5386149A (en) | 1976-10-18 | 1977-10-18 | Carrier synchronizer |
Country Status (6)
Country | Link |
---|---|
US (1) | US4100499A (ja) |
JP (2) | JPS5386149A (ja) |
CA (1) | CA1085003A (ja) |
DE (1) | DE2735945C2 (ja) |
FR (1) | FR2368184A1 (ja) |
GB (1) | GB1534465A (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0318871U (ja) * | 1988-11-11 | 1991-02-25 |
Families Citing this family (39)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1115789A (en) * | 1977-05-12 | 1982-01-05 | Richard P. Scott | Phase shift keyed systems |
FR2394218A1 (fr) * | 1977-06-10 | 1979-01-05 | Ibm France | Recepteur de donnees transmises par modulation binaire par saut de phase entrelacee |
FR2419614A1 (fr) * | 1978-03-10 | 1979-10-05 | Cit Alcatel | Circuit de recuperation de la porteuse d'un signal numerique synchrone transmis par modulation d'amplitude |
US4253067A (en) * | 1978-12-11 | 1981-02-24 | Rockwell International Corporation | Baseband differentially phase encoded radio signal detector |
US4246653A (en) * | 1979-01-08 | 1981-01-20 | Northrop Corporation | In-phase quadrature demodulator for CPSK signals |
FR2449376A1 (fr) * | 1979-02-15 | 1980-09-12 | Trt Telecom Radio Electr | Dispositif de restitution d'horloge pour recepteur de donnees transmises par modulation de phase d'une porteuse |
US4328587A (en) * | 1979-02-19 | 1982-05-04 | Kokusai Denshin Denwa Kabushiki Kaisha | Phase slip detector and systems employing the detector |
US4348641A (en) * | 1980-01-08 | 1982-09-07 | E-Systems, Inc. | Digital baseband carrier recovery circuit |
US4371839A (en) * | 1980-04-03 | 1983-02-01 | Ford Aerospace & Communications Corporation | Differentially coherent signal detector |
US4379266A (en) * | 1980-04-03 | 1983-04-05 | Ford Aerospace & Communications Corporation | PSK Demodulator with automatic compensation of delay induced phase shifts |
US4320345A (en) * | 1980-04-28 | 1982-03-16 | Sangamo Weston, Inc. | Adaptive differential PSK demodulator |
DE3114063A1 (de) * | 1981-04-07 | 1982-10-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Empfangssystem |
JPS5847357A (ja) * | 1981-09-17 | 1983-03-19 | Ricoh Co Ltd | 自動位相制御方式 |
IT1145719B (it) * | 1981-11-12 | 1986-11-05 | Cselt Centro Studi Lab Telecom | Circuito di recupero della partante di un segnale modulato in ampiezza e fase da segnali numerici |
US4457005A (en) * | 1981-12-07 | 1984-06-26 | Motorola, Inc. | Digital coherent PSK demodulator and detector |
JPS58114654A (ja) * | 1981-12-28 | 1983-07-08 | Fujitsu Ltd | 基準搬送波再生回路 |
US4433422A (en) * | 1982-03-29 | 1984-02-21 | Sperry Corporation | Frequency measuring system for alternating frequency signals |
US4475217A (en) * | 1982-11-03 | 1984-10-02 | General Electric Company | Receiver for phase-shift modulated carrier signals |
US4518922A (en) * | 1983-01-17 | 1985-05-21 | Harris Corporation | Decision-directed, automatic frequency control technique for non-coherently demodulated M-ARY frequency shift keying |
US4501002A (en) * | 1983-02-28 | 1985-02-19 | Auchterlonie Richard C | Offset QPSK demodulator and receiver |
US4580101A (en) * | 1983-04-06 | 1986-04-01 | Multitone Electronics Plc | FM demodulators with local oscillator frequency control circuits |
GB2137836B (en) * | 1983-04-06 | 1986-07-23 | Multitone Electronics Plc | Fm demodulators |
US4652834A (en) * | 1983-08-12 | 1987-03-24 | Trw Inc. | Rapid acquisition demodulation system |
US4539524A (en) * | 1983-12-30 | 1985-09-03 | Motorola, Inc. | Method and coherent demodulators for MSK signal |
US4614910A (en) * | 1984-03-12 | 1986-09-30 | Victor Company Of Japan, Ltd. | Quarternary differential PSK demodulator |
JPS60229596A (ja) * | 1984-04-27 | 1985-11-14 | Sony Corp | 直交2相変調信号の復調回路 |
US4571550A (en) * | 1984-06-22 | 1986-02-18 | Rockwell International Corporation | QAM Demodulator carrier recovery loop using n-m LSB's |
US4574244A (en) * | 1984-06-22 | 1986-03-04 | Rockwell International Corporation | QAM Demodulator automatic quadrature loop using n-m LSB's |
US4789948A (en) * | 1985-09-13 | 1988-12-06 | Hughes Aircraft Company | Method and apparatus for determining communications link quality and receiver tracking performance |
GB2180419A (en) * | 1985-09-16 | 1987-03-25 | Philips Electronic Associated | Direct conversion receiver |
EP0305604B1 (en) * | 1987-09-03 | 1992-06-03 | Koninklijke Philips Electronics N.V. | Receiver comprising parallel signal paths |
US4871974A (en) * | 1988-12-23 | 1989-10-03 | International Business Machines, Corp. | Coherent phase shift keyed demodulator |
DE4140132C2 (de) * | 1991-12-05 | 1994-07-21 | Blaupunkt Werke Gmbh | Digitaler Oszillator |
US5586150A (en) * | 1993-11-24 | 1996-12-17 | Rajupandaram K. Balasubramaniam | Method and apparatus for symbol synchronization in multi-level digital FM radio |
JP3077881B2 (ja) * | 1995-03-07 | 2000-08-21 | 日本電気株式会社 | 復調方法及び復調装置 |
JP3250139B2 (ja) * | 1996-03-01 | 2002-01-28 | 三菱電機株式会社 | キャリアスリップ補償機能を備えた受信機 |
AU6669598A (en) * | 1997-03-03 | 1998-09-22 | Int Labs, Inc. | Technique to phase lock a transceiving, transmitting, or receiving local oscillator to an incoming carrier signal |
US6349214B1 (en) | 1999-05-21 | 2002-02-19 | Warren L. Braun | Synchronization of broadcast facilities via satellite |
US6771713B1 (en) * | 2000-10-24 | 2004-08-03 | The Aerospace Corporation | Data aided carrier phase tracking system for precoded continuous phase modulated signals |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2101804C3 (de) * | 1971-01-15 | 1978-09-14 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Verfahren und Schaltungen zum Rückgewinnen der Trägerfrequenz für einen Vierphasen-Demodulator |
JPS5632821B2 (ja) * | 1972-06-19 | 1981-07-30 | ||
US3806815A (en) * | 1973-03-06 | 1974-04-23 | Nasa | Decision feedback loop for tracking a polyphase modulated carrier |
JPS5096169A (ja) * | 1973-12-24 | 1975-07-31 | ||
US3878468A (en) * | 1974-01-30 | 1975-04-15 | Bell Telephone Labor Inc | Joint equalization and carrier recovery adaptation in data transmission systems |
-
1976
- 1976-10-18 FR FR7632450A patent/FR2368184A1/fr active Granted
-
1977
- 1977-08-10 DE DE2735945A patent/DE2735945C2/de not_active Expired
- 1977-09-13 GB GB38157/77A patent/GB1534465A/en not_active Expired
- 1977-09-26 CA CA287,435A patent/CA1085003A/en not_active Expired
- 1977-10-12 US US05/841,257 patent/US4100499A/en not_active Expired - Lifetime
- 1977-10-18 JP JP12412277A patent/JPS5386149A/ja active Pending
-
1983
- 1983-01-11 JP JP1983001346U patent/JPS5921567Y2/ja not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0318871U (ja) * | 1988-11-11 | 1991-02-25 |
Also Published As
Publication number | Publication date |
---|---|
DE2735945A1 (de) | 1978-04-20 |
DE2735945C2 (de) | 1986-08-14 |
JPS5386149A (en) | 1978-07-29 |
JPS5921567Y2 (ja) | 1984-06-26 |
FR2368184A1 (fr) | 1978-05-12 |
FR2368184B1 (ja) | 1982-04-09 |
US4100499A (en) | 1978-07-11 |
CA1085003A (en) | 1980-09-02 |
GB1534465A (en) | 1978-12-06 |
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