ES2047529T3 - Sistema de radio tdma que emplea sincronizacion bpsk para se\ales qpsk sujetas a variacion aleatoria de fases y desvanecimiento pluridireccional. - Google Patents

Sistema de radio tdma que emplea sincronizacion bpsk para se\ales qpsk sujetas a variacion aleatoria de fases y desvanecimiento pluridireccional.

Info

Publication number
ES2047529T3
ES2047529T3 ES88117271T ES88117271T ES2047529T3 ES 2047529 T3 ES2047529 T3 ES 2047529T3 ES 88117271 T ES88117271 T ES 88117271T ES 88117271 T ES88117271 T ES 88117271T ES 2047529 T3 ES2047529 T3 ES 2047529T3
Authority
ES
Spain
Prior art keywords
synchronization
radio system
randomary
multidirectional
fading
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 - Lifetime
Application number
ES88117271T
Other languages
English (en)
Inventor
David Edward Borth
Chih-Fei Wang
Duane C Rabe
Gerald Paul Labedz
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.)
Motorola Solutions Inc
Original Assignee
Motorola Inc
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 Motorola Inc filed Critical Motorola Inc
Application granted granted Critical
Publication of ES2047529T3 publication Critical patent/ES2047529T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/24—Radio transmission systems, i.e. using radiation field for communication between two or more posts
    • H04B7/26—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile
    • H04B7/2643—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using time-division multiple access [TDMA]

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Radio Relay Systems (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)

Abstract

UN MULTIPLE ACCESO DE TIEMPO DE DIVISION (TDMA) DE SISTEMA DE RADIO QUE TRANSPORTA UN AMONIZADOR DEL CAMBIO DE FASE DE CUADRATURA MODULADO (QPSK) EN UNAS SEÑALES DE DATOS, ESTA DISPUESTO. EN ORDEN A VENCER LA DISTORSION DE MULTITRAYECTORIA Y LA VARIACION DE FASE INTRODUCIDA POR EL CANAL DE RADIO, UNA PARTE DE SINCRONIZACION DE UN TIEMPO DE RANURA TDMA ES TRANSMITIDO EN SOLO UN VECTOR DE QPSK DE MODULACION. EL SISTEMA UTILIZA LA PORCION DEL VECTOR DE SINCRONIZACION PARA DESARROLLAR UN TRAZADO DE CANAL ESTIMADO QUE ES APLICADO A LA PORCION DE MENSAJE RECIBIDO DE LA SEÑAL DE DATOS QSPK PARA COMPENSAR LA DISTORSION DE MULTITRAYECTORIA Y LA VARIACION DE FASE DURANTE UN TIEMPO DE RANURA TDMA.
ES88117271T 1987-12-04 1988-10-17 Sistema de radio tdma que emplea sincronizacion bpsk para se\ales qpsk sujetas a variacion aleatoria de fases y desvanecimiento pluridireccional. Expired - Lifetime ES2047529T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/128,677 US4873683A (en) 1987-12-04 1987-12-04 TDMA radio system employing BPSK synchronization for QPSK signals subject to random phase variation and multipath fading

Publications (1)

Publication Number Publication Date
ES2047529T3 true ES2047529T3 (es) 1994-03-01

Family

ID=22436451

Family Applications (1)

Application Number Title Priority Date Filing Date
ES88117271T Expired - Lifetime ES2047529T3 (es) 1987-12-04 1988-10-17 Sistema de radio tdma que emplea sincronizacion bpsk para se\ales qpsk sujetas a variacion aleatoria de fases y desvanecimiento pluridireccional.

Country Status (9)

Country Link
US (1) US4873683A (es)
EP (1) EP0318686B1 (es)
JP (1) JP2990694B2 (es)
AT (1) ATE99475T1 (es)
CA (1) CA1294073C (es)
DE (1) DE3886712T2 (es)
ES (1) ES2047529T3 (es)
FI (1) FI87712C (es)
HK (1) HK19497A (es)

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DE69332139T2 (de) * 1992-04-24 2003-03-27 Oki Electric Industry Co., Ltd. Empfänger für digitale Nachrichtensysteme
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GB2272133B (en) * 1992-11-02 1996-06-12 Motorola Inc Radio system
US5677934A (en) * 1992-12-30 1997-10-14 Nokia Mobile Phones Limited Multipath propagation compensation in a TDMA system
FI94818C (fi) * 1993-06-02 1995-10-25 Nokia Telecommunications Oy Menetelmä digitaalisesti moduloidun signaalin demoduloimiseksi sekä demodulaattori
JP3160453B2 (ja) * 1993-11-29 2001-04-25 松下電器産業株式会社 データ受信装置
US5479453A (en) * 1993-12-29 1995-12-26 Tsci Corporation Wireless telecommunication digital receiver
US5461646A (en) * 1993-12-29 1995-10-24 Tcsi Corporation Synchronization apparatus for a diversity receiver
DE69433267T2 (de) * 1993-12-29 2004-07-22 Atmel Corp., San Jose Digital synchronisierter diversity-funkempfänger
US5533063A (en) * 1994-01-31 1996-07-02 The Regents Of The University Of California Method and apparatus for multipath channel shaping
US6195399B1 (en) * 1994-03-28 2001-02-27 Ericsson Inc. Method and apparatus for converting a wideband if signal to a complex (quadrature) baseband signal
WO1995034140A1 (en) * 1994-06-03 1995-12-14 Motorola, Inc. Method and apparatus for cancelling interference in signals having undergone multipath
US5963586A (en) * 1994-09-09 1999-10-05 Omnipoint Corporation Method and apparatus for parallel noncoherent correlation of a spread spectrum signal
US5881100A (en) * 1994-09-09 1999-03-09 Omnipoint Corporation Method and apparatus for coherent correlation of a spread spectrum signal
US5757847A (en) * 1994-09-09 1998-05-26 Omnipoint Corporation Method and apparatus for decoding a phase encoded signal
US5754584A (en) * 1994-09-09 1998-05-19 Omnipoint Corporation Non-coherent spread-spectrum continuous-phase modulation communication system
US5754585A (en) * 1994-09-09 1998-05-19 Omnipoint Corporation Method and apparatus for serial noncoherent correlation of a spread spectrum signal
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
US5621766A (en) * 1994-10-31 1997-04-15 Motorola, Inc. Method and apparatus for burst detecting
US6128331A (en) * 1994-11-07 2000-10-03 Cisco Systems, Inc. Correlation system for use in wireless direct sequence spread spectrum systems
US5742907A (en) * 1995-07-19 1998-04-21 Ericsson Inc. Automatic clear voice and land-line backup alignment for simulcast system
US6055280A (en) * 1997-06-27 2000-04-25 Raytheon Company High data rate digital demodulator and bit synchronizer
DE69838759T2 (de) * 1997-12-29 2008-10-30 Kabushiki Kaisha Kenwood Schaltung zum fangen eines rahmensynchronisiersignals in einem empfänger
US6560652B1 (en) * 1998-11-20 2003-05-06 Legerity, Inc. Method and apparatus for accessing variable sized blocks of data
FR2808951B1 (fr) * 2000-05-10 2002-09-27 Jean Pierre Dehaene Procede de modulation-demodulation a 4 etats de phase utilisant le poinconnage de certains symboles pour ameliorer l'acquisition de la synchronisation phase- frequence a faible rapport signal a bruit
US6912249B2 (en) * 2001-03-15 2005-06-28 Telefonaktiebolaget L M Ericsson (Publ) Method and system for training a radio receiver
US7603081B2 (en) * 2001-09-14 2009-10-13 Atc Technologies, Llc Radiotelephones and operating methods that use a single radio frequency chain and a single baseband processor for space-based and terrestrial communications
US6973296B2 (en) * 2001-12-04 2005-12-06 Intersil Americas Inc. Soft decision gain compensation for receive filter attenuation
FR2855684B1 (fr) * 2003-05-26 2005-07-01 Commissariat Energie Atomique Recepteur de signal ultra large bande et procede de reception associe.
KR100594146B1 (ko) * 2004-02-11 2006-06-28 삼성전자주식회사 비동기 이동통신 시스템에서 초기 주파수 옵셋 추정 장치및 방법
US7627004B2 (en) * 2005-05-26 2009-12-01 Cisco Technology, Inc. Transporting synchronization channel information across a packet network
FI20065534A0 (fi) * 2006-08-28 2006-08-28 Nokia Corp Synkronisointi
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FR2428946A1 (fr) * 1978-06-13 1980-01-11 Ibm France Procede et dispositif pour initialiser un egaliseur adaptatif a partir d'un signal de donnees inconnu dans un systeme de transmission utilisant la modulation d'amplitude en quadrature
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US4349915A (en) * 1981-02-02 1982-09-14 General Electric Company Minimization of multipath and doppler effects in radiant energy communication systems
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Also Published As

Publication number Publication date
ATE99475T1 (de) 1994-01-15
EP0318686A2 (en) 1989-06-07
DE3886712D1 (de) 1994-02-10
DE3886712T2 (de) 1994-04-28
FI87712B (fi) 1992-10-30
JP2990694B2 (ja) 1999-12-13
EP0318686A3 (en) 1990-08-29
EP0318686B1 (en) 1993-12-29
FI884939A0 (fi) 1988-10-26
FI87712C (fi) 1993-02-10
CA1294073C (en) 1992-01-07
US4873683A (en) 1989-10-10
FI884939L (fi) 1989-06-05
JPH01190152A (ja) 1989-07-31
HK19497A (en) 1997-02-20

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