NO925012L - Demodulator med forsinket deteksjon - Google Patents
Demodulator med forsinket deteksjonInfo
- Publication number
- NO925012L NO925012L NO92925012A NO925012A NO925012L NO 925012 L NO925012 L NO 925012L NO 92925012 A NO92925012 A NO 92925012A NO 925012 A NO925012 A NO 925012A NO 925012 L NO925012 L NO 925012L
- Authority
- NO
- Norway
- Prior art keywords
- phase
- signal
- relative
- exclusive
- comparator
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title abstract 3
- 230000003111 delayed effect Effects 0.000 title 1
- 238000006243 chemical reaction Methods 0.000 abstract 2
- 230000001934 delay Effects 0.000 abstract 1
- 230000007704 transition Effects 0.000 abstract 1
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
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
- H03D13/001—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which a pulse counter is used followed by a conversion into an analog signal
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D13/00—Circuits for comparing the phase or frequency of two mutually-independent oscillations
- H03D13/003—Circuits for comparing the phase or frequency of two mutually-independent oscillations in which both oscillations are converted by logic means into pulses which are applied to filtering or integrating means
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
-
- 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
- H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
- H04L27/2335—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal
- H04L27/2337—Demodulator circuits; Receiver circuits using non-coherent demodulation using temporal properties of the received signal using digital techniques to measure the time between zero-crossings
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D2200/00—Indexing scheme relating to details of demodulation or transference of modulation from one carrier to another covered by H03D
- H03D2200/0041—Functional aspects of demodulators
- H03D2200/0066—Mixing
- H03D2200/007—Mixing by using a logic circuit, e.g. flipflop, XOR
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/161—Multiple-frequency-changing all the frequency changers being connected in cascade
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Manipulation Of Pulses (AREA)
Abstract
Innenfor en demodulator med differensiell deteksjon blir det mottatte signalet først kvantisert ved hjelp av en begrenserforsterker (10) og så underkastet frekvensomforming ved hjelp av en fre- kvens-omformer (50) som omfatter: et eksklusiv- ELLER-element (51); en generator (52) for frembrin- gelse av en løpende middelverdi bestående av et skiftregister (53) og en adderer (54); og en komparator (55). Som reaksjon på utgangen fra frekvensomformeren (50) mater fasekomparatoren (60) ut et relativt fasesignal som representerer fase- dreiningen til det mottatte signal etter frekvens- omforming i forhold til fasereferanse-signalet. Fasekomparatoren (60) omfatter: et eksklusiv-ELLER- element (61) ; en anordning (61) for måling av absolutt fasedreining bestående av en adderer (63) og en bistabil D-vippesammenstilling (64) og (65); og en bistabil D-vippe (66) som tjener som en avgjørelsesanordning for fasedreiningspolaritet. Alternativt kan fase-deteksjonskretsen (400) for generering av det relative fasesignal omfatte: en halvperiode-detektor (901) bestående av et forsin- kelseselementet (401) og et eksklusiv-ELLER-element (402); en fasereferanse-signalgenerator (902) bestående av en modulo 2N teller 403; og en fase- dreinings-måleanordning (903) bestående av en faseinvertering-korreksjonsanordning (500) og en bistabil D-vippesammenstilling (404). Forsinkelseselementet (40) forsinker det relative fasesignalet med en symbolperiode og subtrahereren (41) mater ut fasedifferanse-signalet som represen- terer faseovergangen over hver symbolperiode for det mottatte signal. Avgjørelseskretsen (42) tilveie- bringer de demodulerte data fra fasedifferanse- signalet.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3347245A JP2837982B2 (ja) | 1991-12-27 | 1991-12-27 | 遅延検波復調装置 |
JP4053583A JP2932820B2 (ja) | 1992-03-12 | 1992-03-12 | 位相検波回路及び遅延検波復調装置及び位相検波方法 |
JP6712492A JPH05276061A (ja) | 1992-03-25 | 1992-03-25 | 周波数変換回路 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO925012D0 NO925012D0 (no) | 1992-12-23 |
NO925012L true NO925012L (no) | 1993-06-28 |
Family
ID=27295001
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO92925012A NO925012L (no) | 1991-12-27 | 1992-12-23 | Demodulator med forsinket deteksjon |
Country Status (7)
Country | Link |
---|---|
US (3) | US5313170A (no) |
EP (3) | EP0548982B1 (no) |
AU (2) | AU653660B2 (no) |
CA (1) | CA2086279C (no) |
DE (1) | DE69228862T2 (no) |
FI (1) | FI925870A (no) |
NO (1) | NO925012L (no) |
Families Citing this family (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2837982B2 (ja) * | 1991-12-27 | 1998-12-16 | 三菱電機株式会社 | 遅延検波復調装置 |
US5406218A (en) * | 1993-02-19 | 1995-04-11 | Hitachi, Ltd. | Phase demodulator receiving inputs from phase detector and binary phase detector |
IL107656A (en) * | 1993-11-18 | 1996-11-14 | Dsp Telecomm Ltd | Demodulator |
US5539776A (en) * | 1993-11-24 | 1996-07-23 | At&T Corp. | All digital if-to-baseband signal converter |
US5757868A (en) * | 1994-02-16 | 1998-05-26 | Motorola, Inc. | Digital phase detector with integrated phase detection |
US5572588A (en) * | 1994-07-05 | 1996-11-05 | Motorola, Inc. | Method and apparatus for detecting reception of a tone signal |
JP3390272B2 (ja) * | 1994-11-10 | 2003-03-24 | 沖電気工業株式会社 | 同期検波回路 |
CN1087120C (zh) * | 1994-11-10 | 2002-07-03 | 松下电器产业株式会社 | 直接变频接收机 |
EP0800284B1 (en) * | 1996-04-04 | 2006-01-04 | New Japan Radio Corp., Ltd. | Correlator for spread spectrum signals |
JPH1093646A (ja) * | 1996-09-12 | 1998-04-10 | Pacific Commun Res:Kk | ディジタル直交検波回路 |
US6026117A (en) | 1997-10-23 | 2000-02-15 | Interdigital Technology Corporation | Method and apparatus for generating complex four-phase sequences for a CDMA communication system |
US6160434A (en) * | 1998-05-14 | 2000-12-12 | Mitsubishi Denki Kabushiki Kaisha | Ninety-degree phase shifter |
DE10017923C2 (de) * | 2000-04-11 | 2003-01-02 | Siemens Ag | Messanordnung mit zwei phasenselektiven Gleichrichtern |
US6969984B2 (en) * | 2000-12-21 | 2005-11-29 | Tropian, Inc. | Direct phase and frequency demodulation |
US8218644B1 (en) * | 2009-05-12 | 2012-07-10 | Accumulus Technologies Inc. | System for compressing and de-compressing data used in video processing |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1178935A (en) * | 1967-09-13 | 1970-01-21 | Philips Electronic Associated | Low-Frequency Generator |
US4190802A (en) * | 1978-08-17 | 1980-02-26 | Motorola, Inc. | Digital demodulator for phase shift keyed signals |
US4804925A (en) * | 1986-03-26 | 1989-02-14 | Fuji Photo Film Co., Ltd. | DPSK exclusive-OR demodulator |
JP2554705B2 (ja) * | 1988-04-25 | 1996-11-13 | 三菱電機株式会社 | 位相同期回路 |
US4878029A (en) * | 1988-12-05 | 1989-10-31 | General Electric Company | Complex digital sampling converter for demodulator |
FR2644952A1 (fr) * | 1989-03-21 | 1990-09-28 | Duranton Rene | Modulateur-demodulateur de phase utilisant des portes " ou exclusif " |
EP0434355A3 (en) * | 1989-12-18 | 1993-02-24 | Nec Corporation | Differential phase demodulator for psk-modulated signals |
JPH03274844A (ja) * | 1990-03-24 | 1991-12-05 | Japan Radio Co Ltd | Psk変調信号の遅延検波回路 |
JP2771354B2 (ja) * | 1991-08-26 | 1998-07-02 | 日本電気株式会社 | 復調器 |
-
1992
- 1992-12-23 NO NO92925012A patent/NO925012L/no not_active Application Discontinuation
- 1992-12-23 FI FI925870A patent/FI925870A/fi unknown
- 1992-12-24 CA CA002086279A patent/CA2086279C/en not_active Expired - Fee Related
- 1992-12-24 EP EP92121972A patent/EP0548982B1/en not_active Expired - Lifetime
- 1992-12-24 US US07/997,768 patent/US5313170A/en not_active Expired - Lifetime
- 1992-12-24 AU AU30425/92A patent/AU653660B2/en not_active Ceased
- 1992-12-24 DE DE69228862T patent/DE69228862T2/de not_active Expired - Fee Related
- 1992-12-24 EP EP97120802A patent/EP0833483A3/en not_active Withdrawn
- 1992-12-24 EP EP97120803A patent/EP0831625A3/en not_active Withdrawn
-
1994
- 1994-03-28 US US08/218,977 patent/US5485108A/en not_active Expired - Lifetime
- 1994-03-28 US US08/219,020 patent/US5369374A/en not_active Expired - Lifetime
- 1994-07-25 AU AU68690/94A patent/AU660878B2/en not_active Ceased
Also Published As
Publication number | Publication date |
---|---|
EP0833483A3 (en) | 2006-08-16 |
AU6869094A (en) | 1994-09-22 |
FI925870A (fi) | 1993-06-28 |
EP0831625A3 (en) | 2006-08-16 |
US5369374A (en) | 1994-11-29 |
AU3042592A (en) | 1993-07-01 |
DE69228862D1 (de) | 1999-05-12 |
NO925012D0 (no) | 1992-12-23 |
EP0548982A3 (no) | 1994-04-13 |
US5313170A (en) | 1994-05-17 |
EP0833483A2 (en) | 1998-04-01 |
DE69228862T2 (de) | 1999-10-07 |
EP0548982A2 (en) | 1993-06-30 |
CA2086279C (en) | 1999-08-10 |
FI925870A0 (fi) | 1992-12-23 |
AU660877B2 (en) | 1995-07-06 |
EP0548982B1 (en) | 1999-04-07 |
EP0831625A2 (en) | 1998-03-25 |
AU6868894A (en) | 1994-09-22 |
AU660878B2 (en) | 1995-07-06 |
AU653660B2 (en) | 1994-10-06 |
US5485108A (en) | 1996-01-16 |
CA2086279A1 (en) | 1993-06-28 |
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Legal Events
Date | Code | Title | Description |
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FC2A | Withdrawal, rejection or dismissal of laid open patent application |