DE69310572D1 - Digitaler Demodulator für TT/4-QPSK-Signale - Google Patents

Digitaler Demodulator für TT/4-QPSK-Signale

Info

Publication number
DE69310572D1
DE69310572D1 DE69310572T DE69310572T DE69310572D1 DE 69310572 D1 DE69310572 D1 DE 69310572D1 DE 69310572 T DE69310572 T DE 69310572T DE 69310572 T DE69310572 T DE 69310572T DE 69310572 D1 DE69310572 D1 DE 69310572D1
Authority
DE
Germany
Prior art keywords
digital demodulator
qpsk signals
qpsk
signals
demodulator
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
Application number
DE69310572T
Other languages
English (en)
Other versions
DE69310572T2 (de
Inventor
Toshifumi Sato
Takayuki Shibata
Hideo Ohmura
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NEC Corp
Original Assignee
NEC Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of DE69310572D1 publication Critical patent/DE69310572D1/de
Publication of DE69310572T2 publication Critical patent/DE69310572T2/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • H04L27/233—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
DE69310572T 1992-02-27 1993-02-26 Digitaler Demodulator für TT/4-QPSK-Signale Expired - Fee Related DE69310572T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP4169892 1992-02-27
JP4168392 1992-02-27

Publications (2)

Publication Number Publication Date
DE69310572D1 true DE69310572D1 (de) 1997-06-19
DE69310572T2 DE69310572T2 (de) 1997-09-11

Family

ID=26381337

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69310572T Expired - Fee Related DE69310572T2 (de) 1992-02-27 1993-02-26 Digitaler Demodulator für TT/4-QPSK-Signale

Country Status (7)

Country Link
US (1) US5412694A (de)
EP (1) EP0558034B1 (de)
AU (1) AU658482B2 (de)
CA (1) CA2090367C (de)
DE (1) DE69310572T2 (de)
HK (1) HK1002134A1 (de)
SG (1) SG50573A1 (de)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2643792B2 (ja) * 1993-09-14 1997-08-20 日本電気株式会社 復調装置
IL107656A (en) * 1993-11-18 1996-11-14 Dsp Telecomm Ltd Demodulator
JP3349830B2 (ja) * 1994-07-29 2002-11-25 沖電気工業株式会社 クロック発生回路
EP1376890B1 (de) * 1994-09-09 2009-08-05 XIRCOM Wireless, Inc. Drahtlose Spreizspektrumkommunikation mit Präambel Sondierungslücke
JP3390272B2 (ja) * 1994-11-10 2003-03-24 沖電気工業株式会社 同期検波回路
US5719903A (en) * 1995-06-28 1998-02-17 Motorola, Inc. Method and apparatus for receiving symbols
US5943371A (en) * 1997-03-24 1999-08-24 Delco Electronics Corporation Memory efficient time de-interleave, de-puncture and viterbi decoder circuitry
US5946293A (en) * 1997-03-24 1999-08-31 Delco Electronics Corporation Memory efficient channel decoding circuitry
DE19732894C2 (de) * 1997-07-30 1999-11-11 Siemens Ag Verfahren und Anordnungen zum schnellen Synchronisieren zweier Trägersignale
JPH11177644A (ja) * 1997-12-15 1999-07-02 Nec Corp ビットタイミング再生回路
US7213257B1 (en) * 1999-09-15 2007-05-01 Trilithic, Inc. Determining phase linearity in CATV distribution systems
US7095749B1 (en) 2000-06-12 2006-08-22 Koninkijke Phillips Electronics N.V. Apparatus and method for extraction of different types of packets from respective portions of a single buffer
JP3481574B2 (ja) * 2000-09-19 2003-12-22 沖電気工業株式会社 復調装置
JP4365814B2 (ja) * 2005-09-26 2009-11-18 株式会社東芝 受信機および無線通信装置

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4466108A (en) * 1981-10-06 1984-08-14 Communications Satellite Corporation TDMA/PSK Carrier synchronization without preamble
EP0131054B1 (de) * 1983-01-12 1986-11-05 Ncr Corporation Schaltung zur fehlerverringerung in einem datenempfänger
JPS61129936A (ja) * 1984-11-29 1986-06-17 Toshiba Corp デ−タ再生回路
US4814719A (en) * 1987-12-14 1989-03-21 Ford Aerospace & Communications Corporation Unsymmetrical QPSK demodulator
US4849991A (en) * 1988-06-29 1989-07-18 Bell Communications Research, Inc. Method and circuitry for determining symbol timing for time division multiple access radio systems
US4896336A (en) * 1988-08-29 1990-01-23 Rockwell International Corporation Differential phase-shift keying demodulator
US5202901A (en) * 1991-05-21 1993-04-13 General Electric Company Digital discriminator for pulse shaped π/4 shifted differentially encoded quadrature phase shift keying

Also Published As

Publication number Publication date
AU658482B2 (en) 1995-04-13
EP0558034A3 (de) 1994-01-05
HK1002134A1 (en) 1998-07-31
DE69310572T2 (de) 1997-09-11
CA2090367A1 (en) 1993-08-28
SG50573A1 (en) 1998-07-20
US5412694A (en) 1995-05-02
CA2090367C (en) 1997-09-30
EP0558034A2 (de) 1993-09-01
AU3384193A (en) 1993-09-02
EP0558034B1 (de) 1997-05-14

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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