DE3776054D1 - Qam-demodulator mit schneller resynchronisierungsfunktion. - Google Patents

Qam-demodulator mit schneller resynchronisierungsfunktion.

Info

Publication number
DE3776054D1
DE3776054D1 DE8787114220T DE3776054T DE3776054D1 DE 3776054 D1 DE3776054 D1 DE 3776054D1 DE 8787114220 T DE8787114220 T DE 8787114220T DE 3776054 T DE3776054 T DE 3776054T DE 3776054 D1 DE3776054 D1 DE 3776054D1
Authority
DE
Germany
Prior art keywords
resynchronizing
fast
function
qam demodulator
qam
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
DE8787114220T
Other languages
English (en)
Inventor
Toru Matsuura
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 DE3776054D1 publication Critical patent/DE3776054D1/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
    • H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
    • H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
    • H04L27/38—Demodulator circuits; Receiver circuits
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/01—Equalisers

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
DE8787114220T 1986-09-30 1987-09-29 Qam-demodulator mit schneller resynchronisierungsfunktion. Expired - Fee Related DE3776054D1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP61233060A JPS6387828A (ja) 1986-09-30 1986-09-30 デイジタル復調システム

Publications (1)

Publication Number Publication Date
DE3776054D1 true DE3776054D1 (de) 1992-02-27

Family

ID=16949168

Family Applications (1)

Application Number Title Priority Date Filing Date
DE8787114220T Expired - Fee Related DE3776054D1 (de) 1986-09-30 1987-09-29 Qam-demodulator mit schneller resynchronisierungsfunktion.

Country Status (5)

Country Link
US (1) US4835483A (de)
EP (1) EP0262644B1 (de)
JP (1) JPS6387828A (de)
AU (1) AU593390B2 (de)
DE (1) DE3776054D1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU588201B2 (en) * 1986-07-09 1989-09-07 Nec Corporation 8-phase phase-shift keying demodulator
CA1278347C (en) * 1987-09-22 1990-12-27 Shoichi Mizoguchi Correlation detecting circuit operable in a low frequency
CA2003774C (en) * 1988-11-25 1993-01-26 Atsushi Yoshida Carrier phase synchronizing circuit capable of recovering carrier phase synchronization at a short time
FR2706714B1 (fr) * 1993-06-17 1995-07-21 Alcatel Telspace Système de réception d'un signal numérique à modulation de phase et d'amplitude.
GB2323505B (en) * 1994-03-18 1998-11-04 Fujitsu Ltd Radio receiver for use in the reception of digital multiplexing signals
JP2911773B2 (ja) * 1994-03-18 1999-06-23 富士通株式会社 ディジタル多重無線受信装置
FR2722630A1 (fr) * 1994-07-12 1996-01-19 Philips Electronique Lab Systeme de transmission numerique comportant un recepteur muni d'un dispositif de recuperation de porteuse
FR2733107A1 (fr) * 1995-04-12 1996-10-18 Philips Electronique Lab Systeme de transmission numerique de donnees comportant un recepteur synchronise numeriquement
EP0692896A1 (de) * 1994-07-12 1996-01-17 Laboratoires D'electronique Philips S.A.S. Trägerrückwinnung bei QAM
US5675590A (en) * 1994-11-23 1997-10-07 At&T Wireless Services, Inc. Cyclic trellis coded modulation
US5659578A (en) * 1994-11-23 1997-08-19 At&T Wireless Services, Inc. High rate Reed-Solomon concatenated trellis coded 16 star QAM system for transmission of data over cellular mobile radio
US6889356B1 (en) * 1994-11-23 2005-05-03 Cingular Wireless Ii, Llc Cyclic trellis coded modulation
GB2319703A (en) * 1996-11-02 1998-05-27 Plessey Telecomm AFC in a DMT receiver
US20030067997A1 (en) * 2001-10-04 2003-04-10 Mark Kintis Intermediate frequency signal amplitude equalizer for multichannel applications
US7450670B2 (en) * 2005-06-14 2008-11-11 The Aerospace Corporation Automatic gain control 16-ary quadrature amplitude modulation subsystem

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4283682A (en) * 1979-04-06 1981-08-11 Ricoh Company, Ltd. Erasure zone decision feedback phase lock loop for carrier recovery in data modems
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
US4703282A (en) * 1985-06-29 1987-10-27 Nec Corporation Digital demodulation system

Also Published As

Publication number Publication date
EP0262644A3 (en) 1988-11-30
EP0262644B1 (de) 1992-01-15
US4835483A (en) 1989-05-30
AU7906887A (en) 1988-04-14
EP0262644A2 (de) 1988-04-06
JPS6387828A (ja) 1988-04-19
AU593390B2 (en) 1990-02-08

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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