BR9708147A - Recuperação de transportador de ligação dianteiro em um sistema de comunicação de espectro de difus o de ocdma sem um som piloto - Google Patents

Recuperação de transportador de ligação dianteiro em um sistema de comunicação de espectro de difus o de ocdma sem um som piloto

Info

Publication number
BR9708147A
BR9708147A BR9708147A BR9708147A BR9708147A BR 9708147 A BR9708147 A BR 9708147A BR 9708147 A BR9708147 A BR 9708147A BR 9708147 A BR9708147 A BR 9708147A BR 9708147 A BR9708147 A BR 9708147A
Authority
BR
Brazil
Prior art keywords
signal
base station
communication system
ocdma
recovery
Prior art date
Application number
BR9708147A
Other languages
English (en)
Inventor
Francis D Natali
John Ohlson
Original Assignee
Stanford Telecomm 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 Stanford Telecomm Inc filed Critical Stanford Telecomm Inc
Publication of BR9708147A publication Critical patent/BR9708147A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H04J13/102—Combining codes

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Intermediate Stations On Conveyors (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Circuits Of Receivers In General (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
BR9708147A 1996-03-25 1997-03-24 Recuperação de transportador de ligação dianteiro em um sistema de comunicação de espectro de difus o de ocdma sem um som piloto BR9708147A (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/621,361 US5764630A (en) 1996-03-25 1996-03-25 Forward link carrier recovery in an OCDMA spread spectrum communication system without a pilot tone
PCT/US1997/004281 WO1997036396A1 (en) 1996-03-25 1997-03-24 Forward link carrier recovery in an ocdma spread spectrum communication system without a pilot tone

Publications (1)

Publication Number Publication Date
BR9708147A true BR9708147A (pt) 1999-07-27

Family

ID=24489848

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9708147A BR9708147A (pt) 1996-03-25 1997-03-24 Recuperação de transportador de ligação dianteiro em um sistema de comunicação de espectro de difus o de ocdma sem um som piloto

Country Status (6)

Country Link
US (1) US5764630A (pt)
EP (1) EP0878077B1 (pt)
AT (1) ATE295031T1 (pt)
BR (1) BR9708147A (pt)
DE (1) DE69733195T2 (pt)
WO (1) WO1997036396A1 (pt)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6330291B1 (en) * 1996-03-29 2001-12-11 Qualcomm Inc. Frequency tracking for communication signals using M-ary orthogonal walsh modulation
JPH1022874A (ja) 1996-07-09 1998-01-23 Hitachi Ltd Ｃｄｍａ通信システムおよび通信方法
GB2315647B (en) * 1996-07-23 2001-02-21 Roke Manor Research Randomised code acquisition
US6222828B1 (en) * 1996-10-30 2001-04-24 Trw, Inc. Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications
GB2320660A (en) * 1996-12-20 1998-06-24 Dsc Telecom Lp Processing data transmitted and received over a wireless link connecting a central terminal and a subscriber terminal of a wireless telecommunication system
JP2861985B2 (ja) * 1997-06-16 1999-02-24 日本電気株式会社 Ｃｄｍａ用高速セルサーチ方式
US6055230A (en) 1997-09-05 2000-04-25 Metawave Communications Corporation Embedded digital beam switching
US6317412B1 (en) * 1997-12-12 2001-11-13 Stanford Telecommunications, Inc. Increased capacity in an OCDMA system for frequency isolation
US6075781A (en) * 1997-12-12 2000-06-13 Stanford Telecommunications, Inc. Flux density reduction in OCDMA satellite communication system
US6205167B1 (en) * 1997-12-23 2001-03-20 Philips Electronics North America Corporation Apparatus and method for code tracking in an IS-95 spread spectrum communications system
US6570844B1 (en) 1997-12-29 2003-05-27 Alcatel Usa Sourcing, L.P. System and method for providing redundancy in a telecommunications system
US6512755B1 (en) 1997-12-29 2003-01-28 Alcatel Usa Sourcing, L.P. Wireless telecommunications access system
US6603801B1 (en) * 1998-01-16 2003-08-05 Intersil Americas Inc. Spread spectrum transceiver for use in wireless local area network and having multipath mitigation
US6563858B1 (en) * 1998-01-16 2003-05-13 Intersil Americas Inc. Method of performing antenna diversity in spread spectrum in wireless local area network
WO2000013334A1 (en) * 1998-08-28 2000-03-09 Siemens Aktiengesellschaft Receiver and method of recovering data from radio signals
US6980531B1 (en) 1998-12-02 2005-12-27 At&T Corp. Multiple access spread spectrum switching methodology
US6301311B1 (en) * 1999-02-10 2001-10-09 Anritsu Company Non-coherent, non-data-aided pseudo-noise synchronization and carrier synchronization for QPSK or OQPSK modulated CDMA system
US7062002B1 (en) * 1999-04-29 2006-06-13 Siemens Aktiengesellschaft Method for synchronizing a base station with a mobile station, a base station and a mobile station
DE19928019B4 (de) * 1999-06-18 2004-02-19 Alcatel Empfangseinrichtung für ein synchrones Mehrpunkt-zu-Punkt CDMA Netzwerk
CA2276971A1 (en) * 1999-07-06 2001-01-06 Wen Tong Preamble using golay sequence for access channel in cellular communications systems
EP1085705B1 (de) * 1999-09-16 2006-10-18 Philips Intellectual Property & Standards GmbH Netzwerk mit mehreren Netzknoten und wenigstens einem Sternknoten
US6628735B1 (en) 1999-12-22 2003-09-30 Thomson Licensing S.A. Correction of a sampling frequency offset in an orthogonal frequency division multiplexing system
US6963602B1 (en) * 2000-01-05 2005-11-08 Advanced Micro Devices, Inc. Digital correction method and system
US7173921B1 (en) 2000-10-11 2007-02-06 Aperto Networks, Inc. Protocol for allocating upstream slots over a link in a point-to-multipoint communication system
CN1140075C (zh) * 2000-12-18 2004-02-25 信息产业部电信传输研究所 基于多径能量窗的码分多址系统初始同步与小区搜索装置
CN1120591C (zh) * 2000-12-18 2003-09-03 信息产业部电信传输研究所 直接扩频/码分多址综合扩频相干接收装置
US7289460B1 (en) * 2002-06-14 2007-10-30 Lockheed Martin Corporation Satellite communications system
CN1306808C (zh) * 2003-02-14 2007-03-21 上海交通大学 数字地面广播传输中系统信息的扩展频谱传输方法
CN100393171C (zh) * 2005-05-10 2008-06-04 上海贝尔三星移动通信有限公司 一种码分多址移动通信系统中提高接通率的方法和设备
US8369428B2 (en) * 2007-02-09 2013-02-05 Nxp B.V. Method of synchronizing multi-carrier systems and multi-carrier system
EP2280491B1 (en) 2009-07-31 2012-07-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for estimating a frequency shift and a time shift
US8913566B1 (en) 2010-04-12 2014-12-16 Sprint Spectrum L.P. Using traffic channels to extend wireless coverage in poor pilot-signal conditions
US8576736B1 (en) 2010-11-10 2013-11-05 Sprint Spectrum L.P. Method and system for spread spectrum signal acquisition without a pilot signal

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5579338A (en) * 1992-06-29 1996-11-26 Mitsubishi Denki Kabushiki Kaisha Spread spectrum receiver using partial correlations
US5414728A (en) * 1993-11-01 1995-05-09 Qualcomm Incorporated Method and apparatus for bifurcating signal transmission over in-phase and quadrature phase spread spectrum communication channels
US5566164A (en) * 1994-12-19 1996-10-15 Stanford Telecommunications, Inc. Practical means for digital generation and combination of a multiplicity of CDMA/FDMA signals

Also Published As

Publication number Publication date
AU2533197A (en) 1997-10-17
EP0878077A4 (en) 1999-05-19
WO1997036396A1 (en) 1997-10-02
EP0878077A1 (en) 1998-11-18
ATE295031T1 (de) 2005-05-15
DE69733195T2 (de) 2006-02-16
EP0878077B1 (en) 2005-05-04
AU713299B2 (en) 1999-11-25
DE69733195D1 (de) 2005-06-09
US5764630A (en) 1998-06-09

Similar Documents

Publication Publication Date Title
BR9708147A (pt) Recuperação de transportador de ligação dianteiro em um sistema de comunicação de espectro de difus o de ocdma sem um som piloto
US5263045A (en) Spread spectrum conference call system and method
HK1015211A1 (en) Quadrature multiplexing of two data signals spreadby different pn-sequences
CA2679170A1 (en) Synchronous spread-spectrum communications system and method
AR033950A2 (es) Unidad de abonado para un sistema de comunicacion de banda ancha de multiple acceso
EP0564937B1 (en) CDMA Radio communication system with pilot signal transmission between base station and handsets for channel distortion compensation
HK1037286A1 (en) A transmitter in a spread spectrum communications system and method thereof.
CA2217575A1 (en) Signal transmission method, transmitter, receiver, and spreading code sychronizing method in mobile communication system
ATE262242T1 (de) Netzzugangskanal für cdma-systeme
RU99120788A (ru) Архитектура многопользовательской системы связи с распределенными передатчиками
KR950022269A (ko) 직접확산/부호분할 다중접근 시스템에서의 업-링크 접근 시스템
CA2126237A1 (en) Code Division Multiple Access Mobile Communication System
KR0159201B1 (ko) Cdma 시스템에서의 동기식 이중 채널 qpsk 변복조 장치 및 그 변복조방법
EP0827296B1 (en) CDMA communication system
US6018547A (en) Method and apparatus for increasing spectral efficiency of CDMA systems using direct sequence spread spectrum signals
CA2214058A1 (en) Method and system providing unified dpsk-psk signalling for cdma-based satellite communications
CA2248625A1 (en) Forward link carrier recovery in an ocdma spread spectrum communication system without a pilot tone
JP3339604B2 (ja) ページング通信方法および通信システム
JPH01188130A (ja) スペクトラム拡散通信装置
CA2354687A1 (en) Synchronous spread-spectrum communications system and method
CA2320678A1 (en) Synchronous spread-spectrum communications system and method
CA2620101A1 (en) Quadriphase spreading codes in code division multiple access communications

Legal Events

Date Code Title Description
FB36 Technical and formal requirements: requirement - article 36 of industrial property law
FA8 Dismissal: dismissal - article 36, par. 1 of industrial property law