FI922778A0 - Modem foer utdoeende digitala kanaler som paoverkas av en flervaeg. - Google Patents

Modem foer utdoeende digitala kanaler som paoverkas av en flervaeg.

Info

Publication number
FI922778A0
FI922778A0 FI922778A FI922778A FI922778A0 FI 922778 A0 FI922778 A0 FI 922778A0 FI 922778 A FI922778 A FI 922778A FI 922778 A FI922778 A FI 922778A FI 922778 A0 FI922778 A0 FI 922778A0
Authority
FI
Finland
Prior art keywords
utdoeende
paoverkas
flervaeg
kanaler
digitala
Prior art date
Application number
FI922778A
Other languages
English (en)
Inventor
David N Critchlow
Original Assignee
Hughes Aircraft Co
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 Hughes Aircraft Co filed Critical Hughes Aircraft Co
Publication of FI922778A0 publication Critical patent/FI922778A0/fi

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
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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
    • H04L2027/003—Correction of carrier offset at baseband 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
    • H04L2027/0024—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
    • H04L2027/0053—Closed loops
    • H04L2027/0055—Closed loops single phase
    • 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
FI922778A 1991-06-17 1992-06-16 Modem foer utdoeende digitala kanaler som paoverkas av en flervaeg. FI922778A0 (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/716,171 US5311545A (en) 1991-06-17 1991-06-17 Modem for fading digital channels affected by multipath

Publications (1)

Publication Number Publication Date
FI922778A0 true FI922778A0 (fi) 1992-06-16

Family

ID=24877043

Family Applications (1)

Application Number Title Priority Date Filing Date
FI922778A FI922778A0 (fi) 1991-06-17 1992-06-16 Modem foer utdoeende digitala kanaler som paoverkas av en flervaeg.

Country Status (4)

Country Link
US (1) US5311545A (fi)
EP (1) EP0519891A3 (fi)
FI (1) FI922778A0 (fi)
NO (1) NO922285D0 (fi)

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US5400366A (en) * 1992-07-09 1995-03-21 Fujitsu Limited Quasi-synchronous detection and demodulation circuit and frequency discriminator used for the same
CA2110881C (en) * 1992-12-09 1998-07-28 Kyo Takahashi Adaptive equalizer capable of compensating for carrier frequency offset
KR960011125B1 (ko) * 1993-01-30 1996-08-20 삼성전자 주식회사 시분할 다중 통신 채널용 디지탈 복조 회로
US5475705A (en) * 1993-04-29 1995-12-12 Ericsson Ge Mobile Communications Inc. Demodulator for Manchester-coded FM signals
US5467374A (en) * 1993-10-29 1995-11-14 General Electric Company Low complexity adaptive equalizer for U.S. digital cellular radio receivers
US5572552A (en) * 1994-01-27 1996-11-05 Ericsson Ge Mobile Communications Inc. Method and system for demodulation of downlink CDMA signals
US5514998A (en) * 1994-01-27 1996-05-07 Hughes Aircraft Company Method and system for demodulating GMSK signals in a cellular digital packet data system
US5553098A (en) * 1994-04-12 1996-09-03 Sicom, Inc. Demodulator with selectable coherent and differential data
US5526380A (en) * 1994-06-07 1996-06-11 Texas Instruments Incorporated First-order loop control configuration for a phase-rotator based clock synchronization circuit
KR0145439B1 (ko) * 1994-06-14 1998-07-15 김광호 고선명 텔레비젼용 적응등화기의 동작제어 방법 및 장치
US5594757A (en) * 1994-07-28 1997-01-14 Motorola, Inc. Method and apparatus for digital automatic frequency control
JP3581448B2 (ja) * 1994-10-21 2004-10-27 キヤノン株式会社 スペクトラム拡散通信装置
US5684836A (en) * 1994-12-22 1997-11-04 Mitsubishi Denki Kabushiki Kaisha Receiver with automatic frequency control
JP3575883B2 (ja) * 1995-09-18 2004-10-13 三菱電機株式会社 ディジタル復調器
US5940441A (en) * 1996-10-29 1999-08-17 International Business Machines Corporation Integrated adaptive cable equalizer using a continuous-time filter
US5960044A (en) * 1996-11-14 1999-09-28 Scientific-Atlanta, Inc. Apparatus and method for block phase estimation
AU723679B2 (en) 1997-03-04 2000-08-31 Mitsubishi Denki Kabushiki Kaisha Receiver with a frequency offset correcting function
US6522696B1 (en) * 1997-04-11 2003-02-18 Agere Systems Inc. Adaptive frequency correction in a wireless communications system, such as for GSM and IS54
US6771721B1 (en) * 1997-06-20 2004-08-03 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for eliminating audio clicks in a radio receiver
US6002713A (en) * 1997-10-22 1999-12-14 Pc Tel, Inc. PCM modem equalizer with adaptive compensation for robbed bit signalling
DE19747367C2 (de) * 1997-10-27 2003-06-26 Siemens Ag Verfahren und Anordnung zur Übertragung von Daten über eine Funkschnittstelle in einem Funk-Kommunikationssystem
CN1110180C (zh) * 1997-12-17 2003-05-28 株式会社建伍 接收机
US5969570A (en) * 1998-03-16 1999-10-19 Hewlett-Packard Company Reduced-tap filter in a demodulator
FI106327B (fi) * 1998-07-10 2001-01-15 Nokia Networks Oy Tiedonsiirtomenetelmä ja radiojärjestelmä
DE69829661T2 (de) * 1998-09-17 2006-03-09 Sony International (Europe) Gmbh Weichentscheidungsverfahren und-vorrichtung bei einer 8-PSK-Demodulation
AU730282B2 (en) * 1999-02-18 2001-03-01 Nippon Telegraph & Telephone Corporation Coherent detection system for multicarrier modulation
US6873663B1 (en) 2000-02-16 2005-03-29 Telefonaktiebolaget Lm Ericsson Reception of M-ary PSK-modulated signals
JP3497480B2 (ja) * 2000-09-04 2004-02-16 松下電器産業株式会社 位相回転検出装置及びそれを備えた無線基地局装置
US6829311B1 (en) 2000-09-19 2004-12-07 Kaben Research Inc. Complex valued delta sigma phase locked loop demodulator
AU2001293560A1 (en) * 2000-09-19 2002-04-02 Tom Riley Complex valued delta sigma phase locked loop demodulator
US7106811B2 (en) * 2003-11-12 2006-09-12 Interdigital Technology Corporation Wireless communication method and apparatus for performing post-detection constellation correction
US7529320B2 (en) * 2005-09-16 2009-05-05 Agere Systems Inc. Format efficient timing acquisition for magnetic recording read channels
US7613260B2 (en) * 2005-11-21 2009-11-03 Provigent Ltd Modem control using cross-polarization interference estimation
US7796708B2 (en) 2006-03-29 2010-09-14 Provigent Ltd. Adaptive receiver loops with weighted decision-directed error
US7643512B2 (en) * 2006-06-29 2010-01-05 Provigent Ltd. Cascaded links with adaptive coding and modulation
US7839952B2 (en) 2006-12-05 2010-11-23 Provigent Ltd Data rate coordination in protected variable-rate links
US7720136B2 (en) * 2006-12-26 2010-05-18 Provigent Ltd Adaptive coding and modulation based on link performance prediction
US8315574B2 (en) * 2007-04-13 2012-11-20 Broadcom Corporation Management of variable-rate communication links
US7821938B2 (en) 2007-04-20 2010-10-26 Provigent Ltd. Adaptive coding and modulation for synchronous connections
US8001445B2 (en) 2007-08-13 2011-08-16 Provigent Ltd. Protected communication link with improved protection indication
US8040985B2 (en) 2007-10-09 2011-10-18 Provigent Ltd Decoding of forward error correction codes in the presence of phase noise
GB2474180A (en) * 2008-07-25 2011-04-06 Smith International PDC bit having split blades

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US4466108A (en) * 1981-10-06 1984-08-14 Communications Satellite Corporation TDMA/PSK Carrier synchronization without preamble
JPS60154758A (ja) * 1984-01-25 1985-08-14 Alps Electric Co Ltd Ｐｓｋ復調装置
US4599732A (en) * 1984-04-17 1986-07-08 Harris Corporation Technique for acquiring timing and frequency synchronization for modem utilizing known (non-data) symbols as part of their normal transmitted data format
US4961206A (en) * 1984-11-22 1990-10-02 Martin Tomlinson Data modem system
US4631738A (en) * 1984-12-06 1986-12-23 Paradyne Corporation Gain tracker for digital modem
US4644561A (en) * 1985-03-20 1987-02-17 International Mobile Machines Corp. Modem for RF subscriber telephone system
SE460086B (sv) * 1987-11-27 1989-09-04 Ericsson Telefon Ab L M Anordning foer korrigering av frekvensen i en koherent mottagare
US4910467A (en) * 1988-11-02 1990-03-20 Motorola, Inc. Method and apparatus for decoding a quadrature modulated signal
US5150384A (en) * 1990-09-28 1992-09-22 Motorola, Inc. Carrier recovery method and apparatus having an adjustable response time determined by carrier signal parameters
US5148452A (en) * 1990-12-31 1992-09-15 Motorola, Inc. Global positioning system digital receiver

Also Published As

Publication number Publication date
US5311545A (en) 1994-05-10
NO922285D0 (no) 1992-06-11
EP0519891A3 (en) 1993-03-17
EP0519891A2 (en) 1992-12-23

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