AR001852A1 - Un método para buscar una señal de multiples trayectorias transmitidas a velocidades visibles desconocidas y que comparten una banda de frecuencia comun en sistemas de comunicaciones de telefonía celular - Google Patents

Un método para buscar una señal de multiples trayectorias transmitidas a velocidades visibles desconocidas y que comparten una banda de frecuencia comun en sistemas de comunicaciones de telefonía celular

Info

Publication number
AR001852A1
AR001852A1 AR33640296A AR33640296A AR001852A1 AR 001852 A1 AR001852 A1 AR 001852A1 AR 33640296 A AR33640296 A AR 33640296A AR 33640296 A AR33640296 A AR 33640296A AR 001852 A1 AR001852 A1 AR 001852A1
Authority
AR
Argentina
Prior art keywords
processor
sharing
searching
frequency band
communication systems
Prior art date
Application number
AR33640296A
Other languages
English (en)
Inventor
Noam A Ziv
Roberto Padovani
Jeffrey A Levin
Kenneth D Easton
Original Assignee
Qualcomm 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 Qualcomm Inc filed Critical Qualcomm Inc
Publication of AR001852A1 publication Critical patent/AR001852A1/es

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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70751—Synchronisation aspects with code phase acquisition using partial detection
    • H04B1/70752—Partial correlation
    • 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
    • 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
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/7075—Synchronisation aspects with code phase acquisition
    • H04B1/70756—Jumping within the code, i.e. masking or slewing
    • 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
    • H04B7/2628—Radio transmission systems, i.e. using radiation field for communication between two or more posts at least one of which is mobile using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0007—Code type
    • H04J13/004—Orthogonal
    • H04J13/0048—Walsh
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7113—Determination of path profile
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
    • H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
    • H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
    • H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Relay Systems (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Radio Transmission System (AREA)

Abstract

La invención se refiere a un método para buscar una senal de múltiples trayectorias, transmitida a velocidad variable desconocida y que comparte unabanda de frecuencia común en sistemas de comunicaciones de telefonía celular. El método esimpl ementado por una procesadora de exploración integrada,utilizada en un modem para un sistema de comunicaciones de espectro distinguido, memoriza temporalmente muestras de recepción y utiliza unaprocesadora de transformadas, en tiemporeban ado, que opera en sucesivos desplazamientos de la memoria intermedia. La procesadora de exploraciónprogresa de manera autónoma, mediante pasos, a través de una exploración configurada por un conjunto de parámetros de exploraciónespecif icada pormicro-procesadora, el cual conjunto puede incluir el grupo de antenas a ser explorado, el desplazamiento de partida y el ancho de la ventana de exploracióna ser explorada, y la cantidad de símbolos de Walsh, a efectos deacumular los re sultados en cada uno de los desplazamientos. La procesadora de exploracióncalcula la energía de correlación en cada uno de los desplazamientos, y presenta un informe resumido de las mejoras trayectorias halladas enlaexploración para ser util izadas en las reasignaciones de los elementos de demodulación. La exploración es efectuada en una modalidad lineal,independientemente de la probabilidad de que una senal que se está buscando, hubiera sidotransmitida en cualquier tiempo dado
AR33640296A 1995-05-05 1996-05-03 Un método para buscar una señal de multiples trayectorias transmitidas a velocidades visibles desconocidas y que comparten una banda de frecuencia comun en sistemas de comunicaciones de telefonía celular AR001852A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/436,029 US5710768A (en) 1994-09-30 1995-05-05 Method of searching for a bursty signal

Publications (1)

Publication Number Publication Date
AR001852A1 true AR001852A1 (es) 1997-12-10

Family

ID=23730811

Family Applications (1)

Application Number Title Priority Date Filing Date
AR33640296A AR001852A1 (es) 1995-05-05 1996-05-03 Un método para buscar una señal de multiples trayectorias transmitidas a velocidades visibles desconocidas y que comparten una banda de frecuencia comun en sistemas de comunicaciones de telefonía celular

Country Status (20)

Country Link
US (2) US5710768A (es)
EP (1) EP0824802B1 (es)
JP (1) JP3388754B2 (es)
KR (1) KR100380427B1 (es)
CN (1) CN1099171C (es)
AR (1) AR001852A1 (es)
AT (1) ATE227481T1 (es)
AU (1) AU699159B2 (es)
BR (1) BR9608287A (es)
DE (1) DE69624698T2 (es)
ES (1) ES2184871T3 (es)
FI (1) FI113820B (es)
HK (1) HK1017523A1 (es)
IL (1) IL118116A (es)
MX (1) MX9708514A (es)
MY (1) MY113603A (es)
RU (1) RU2157592C2 (es)
TW (1) TW297974B (es)
WO (1) WO1996035268A1 (es)
ZA (1) ZA963188B (es)

Families Citing this family (155)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5710768A (en) * 1994-09-30 1998-01-20 Qualcomm Incorporated Method of searching for a bursty signal
US7929498B2 (en) * 1995-06-30 2011-04-19 Interdigital Technology Corporation Adaptive forward power control and adaptive reverse power control for spread-spectrum communications
US6885652B1 (en) * 1995-06-30 2005-04-26 Interdigital Technology Corporation Code division multiple access (CDMA) communication system
US7072380B2 (en) * 1995-06-30 2006-07-04 Interdigital Technology Corporation Apparatus for initial power control for spread-spectrum communications
US7123600B2 (en) * 1995-06-30 2006-10-17 Interdigital Technology Corporation Initial power control for spread-spectrum communications
US7020111B2 (en) * 1996-06-27 2006-03-28 Interdigital Technology Corporation System for using rapid acquisition spreading codes for spread-spectrum communications
ZA965340B (en) * 1995-06-30 1997-01-27 Interdigital Tech Corp Code division multiple access (cdma) communication system
US6801516B1 (en) 1995-06-30 2004-10-05 Interdigital Technology Corporation Spread-spectrum system for assigning information signals having different data rates
US6975582B1 (en) * 1995-07-12 2005-12-13 Ericsson Inc. Dual mode satellite/cellular terminal
JP3598609B2 (ja) * 1995-09-20 2004-12-08 双葉電子工業株式会社 スペクトル拡散通信システムにおける受信装置
US6678311B2 (en) 1996-05-28 2004-01-13 Qualcomm Incorporated High data CDMA wireless communication system using variable sized channel codes
US5881058A (en) * 1996-11-25 1999-03-09 Motorola, Inc. Method for performing a signal search in a wireless communication system
JPH10173630A (ja) * 1996-12-13 1998-06-26 Nec Corp Ｃｄｍａチップ同期回路
US5909462A (en) * 1996-12-31 1999-06-01 Lucent Technologies Inc. System and method for improved spread spectrum signal detection
US6724738B1 (en) 1997-02-27 2004-04-20 Motorola Inc. Method and apparatus for acquiring a pilot signal in a CDMA receiver
US6144649A (en) 1997-02-27 2000-11-07 Motorola, Inc. Method and apparatus for acquiring a pilot signal in a CDMA receiver
US6345078B1 (en) * 1997-07-31 2002-02-05 Lucent Technologies Inc. Finger assignment system for a multiple finger receiver and method thereof
US6201802B1 (en) * 1997-08-29 2001-03-13 Qualcomm Inc. Method and apparatus for analyzing base station timing
US6285655B1 (en) * 1997-09-08 2001-09-04 Qualcomm Inc. Method and apparatus for providing orthogonal spot beams, sectors, and picocells
US6307840B1 (en) * 1997-09-19 2001-10-23 Qualcomm Incorporated Mobile station assisted timing synchronization in CDMA communication system
US5872774A (en) * 1997-09-19 1999-02-16 Qualcomm Incorporated Mobile station assisted timing synchronization in a CDMA communication system
US6707842B2 (en) 1997-10-22 2004-03-16 Via Telecom Co., Ltd. Accelerated base station searching by buffering samples
US6064691A (en) * 1997-10-22 2000-05-16 Lsi Logic Corporation Method and apparatus for acquisition of the strongest pilot signal
US20020051434A1 (en) * 1997-10-23 2002-05-02 Ozluturk Fatih M. Method for using rapid acquisition spreading codes for spread-spectrum communications
US6275482B1 (en) * 1997-10-28 2001-08-14 Qwest Communications International Inc. Combined angular, spatial, and temporal diversity for mobile radio system
US9118387B2 (en) * 1997-11-03 2015-08-25 Qualcomm Incorporated Pilot reference transmission for a wireless communication system
US7184426B2 (en) * 2002-12-12 2007-02-27 Qualcomm, Incorporated Method and apparatus for burst pilot for a time division multiplex system
US6639906B1 (en) * 1997-12-09 2003-10-28 Jeffrey A. Levin Multichannel demodulator
JP3492177B2 (ja) * 1997-12-15 2004-02-03 松下電器産業株式会社 Ｃｄｍａ方式移動体通信機
US7394791B2 (en) * 1997-12-17 2008-07-01 Interdigital Technology Corporation Multi-detection of heartbeat to reduce error probability
US8175120B2 (en) * 2000-02-07 2012-05-08 Ipr Licensing, Inc. Minimal maintenance link to support synchronization
US6222832B1 (en) * 1998-06-01 2001-04-24 Tantivy Communications, Inc. Fast Acquisition of traffic channels for a highly variable data rate reverse link of a CDMA wireless communication system
US9525923B2 (en) 1997-12-17 2016-12-20 Intel Corporation Multi-detection of heartbeat to reduce error probability
US7936728B2 (en) * 1997-12-17 2011-05-03 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
US7079523B2 (en) * 2000-02-07 2006-07-18 Ipr Licensing, Inc. Maintenance link using active/standby request channels
KR100269341B1 (ko) 1997-12-19 2000-10-16 서평원 이동통신시스템의기저대역신호복조장치및방법
US6240082B1 (en) * 1998-03-10 2001-05-29 Lucent Technologies Inc. Router for daisy-chained components
US6094562A (en) * 1998-04-07 2000-07-25 Lucent Technologies Inc. Timing compensation for distant base station antennas in telecommunication systems
US6526029B1 (en) * 1998-04-24 2003-02-25 Lucent Technologies Inc. Search scheme for receivers in mobile communication systems
US7773566B2 (en) * 1998-06-01 2010-08-10 Tantivy Communications, Inc. System and method for maintaining timing of synchronization messages over a reverse link of a CDMA wireless communication system
US8134980B2 (en) * 1998-06-01 2012-03-13 Ipr Licensing, Inc. Transmittal of heartbeat signal at a lower level than heartbeat request
KR100291477B1 (ko) * 1998-06-02 2001-07-12 윤종용 이동통신시스템의가변데이터율전송환경에서순차적경로검색방법
JP3260716B2 (ja) 1998-06-05 2002-02-25 松下電器産業株式会社 送信装置及びそれを用いた基地局装置
KR100277761B1 (ko) 1998-06-25 2001-01-15 윤종용 셀룰러 시스템에서 이동 단말기의 탐색 범위설정 방법
US5978365A (en) * 1998-07-07 1999-11-02 Orbital Sciences Corporation Communications system handoff operation combining turbo coding and soft handoff techniques
KR20000014990A (ko) * 1998-08-26 2000-03-15 윤종용 이동가입자의 호 제한방법
US6304759B1 (en) 1998-08-31 2001-10-16 Lucent Technologies Inc. Method for extending the range of a wireless communication system
US6363261B1 (en) 1998-08-31 2002-03-26 Lucent Technologies Inc. Extended range concentric cell base station
US6201827B1 (en) * 1998-09-09 2001-03-13 Qualcomm Incorporated System and method for probability based lock detection
US6125137A (en) * 1998-09-11 2000-09-26 Motorola, Inc. Apparatus and method for performing a signal search in a coherent wireless communication system
US6944149B1 (en) * 1998-09-24 2005-09-13 Samsung Electronics Co., Ltd. Apparatus and method or searching for PN sequence phase in multi-carrier CDMA mobile communication system
US6625208B2 (en) * 1998-09-25 2003-09-23 Intel Corporation Modem using batch processing of signal samples
US6490628B2 (en) * 1998-09-25 2002-12-03 Intel Corporation Modem using a digital signal processor and a signal based command set
US6661848B1 (en) 1998-09-25 2003-12-09 Intel Corporation Integrated audio and modem device
US6502138B2 (en) * 1998-09-25 2002-12-31 Intel Corporation Modem with code execution adapted to symbol rate
KR100430136B1 (ko) 1998-10-27 2004-05-03 지멘스 악티엔게젤샤프트 제 3 세대 이동 무선전화기 시스템의 레이크 수신기
JP3267569B2 (ja) * 1998-11-27 2002-03-18 日本電気株式会社 サーチャ制御方法とサーチャ制御装置及び無線通信装置
US6456646B1 (en) * 1998-11-30 2002-09-24 Ericsson Inc. Methods and systems for detecting codewords with intersymbol interference and imperfect timing
US6512925B1 (en) * 1998-12-03 2003-01-28 Qualcomm, Incorporated Method and apparatus for controlling transmission power while in soft handoff
KR100315670B1 (ko) * 1998-12-07 2001-11-29 윤종용 부호분할다중접속 통신시스템의 단속 송신장치 및 방법
EP1014275A1 (en) 1998-12-23 2000-06-28 TELEFONAKTIEBOLAGET L M ERICSSON (publ) Pipeline processing for data channels
US6567390B1 (en) 1999-03-29 2003-05-20 Lsi Logic Corporation Accelerated message decoding
US6404758B1 (en) * 1999-04-19 2002-06-11 Ericsson, Inc. System and method for achieving slot synchronization in a wideband CDMA system in the presence of large initial frequency errors
TW463481B (en) * 1999-04-28 2001-11-11 Fujitsu Ltd Cell search method, communication synchronization apparatus, portable terminal apparatus, and recording medium
US7085246B1 (en) 1999-05-19 2006-08-01 Motorola, Inc. Method and apparatus for acquisition of a spread-spectrum signal
US7031271B1 (en) 1999-05-19 2006-04-18 Motorola, Inc. Method of and apparatus for activating a spread-spectrum radiotelephone
US6157847A (en) 1999-06-29 2000-12-05 Lucent Technologies Inc. Base station system including parallel interference cancellation processor
US6718170B1 (en) * 1999-07-01 2004-04-06 Qualcomm Incorporated Dynamic allocation of microprocessor resources in a wireless communication device
US6320849B1 (en) * 1999-07-01 2001-11-20 Qualcomm Incorporated Dynamic control of search duration in a wireless communication device
JP3715141B2 (ja) * 1999-07-13 2005-11-09 松下電器産業株式会社 通信端末装置
US8064409B1 (en) 1999-08-25 2011-11-22 Qualcomm Incorporated Method and apparatus using a multi-carrier forward link in a wireless communication system
US6785554B1 (en) * 1999-09-15 2004-08-31 Qualcomm Incorporated Modified finger assignment algorithm for high data rate calls
US6621804B1 (en) 1999-10-07 2003-09-16 Qualcomm Incorporated Method and apparatus for predicting favored supplemental channel transmission slots using transmission power measurements of a fundamental channel
US6526090B1 (en) * 1999-12-28 2003-02-25 Texas Instruments Incorporated Demodulation element assignment for a receiver capable of simultaneously demodulating multiple spread spectrum signals
US6654384B1 (en) * 1999-12-30 2003-11-25 Aperto Networks, Inc. Integrated self-optimizing multi-parameter and multi-variable point to multipoint communication system
AU2915201A (en) * 1999-12-30 2001-07-16 Morphics Technology, Inc. A fast initial acquisition and search device for a spread spectrum communicationsystem
JP2001211101A (ja) * 2000-01-26 2001-08-03 Nec Corp 低消費電力ｃｄｍａ受信機、及びその消費電力低減方法
CN101345561A (zh) * 2000-02-23 2009-01-14 Ipr特许公司 带碰撞检测的访问探针的确认
US7466741B2 (en) 2000-03-03 2008-12-16 Qualcomm Incorporated Method and apparatus for concurrently processing multiple calls in a spread spectrum communications system
US7103095B2 (en) * 2000-03-06 2006-09-05 Texas Instruments Incorporated Spread spectrum code correlator
US7224719B1 (en) 2000-03-31 2007-05-29 Qualcomm, Incorporated Fast acquisition of a pilot signal in a wireless communication device
US6704577B1 (en) * 2000-03-31 2004-03-09 Qualcomm, Incorporated Efficient searching by a remote unit in a slotted mode communication system
US6947931B1 (en) * 2000-04-06 2005-09-20 International Business Machines Corporation Longest prefix match (LPM) algorithm implementation for a network processor
SE0003289D0 (sv) * 2000-05-18 2000-09-15 Ericsson Telefon Ab L M Radio receiver and channel estimator
US6628702B1 (en) * 2000-06-14 2003-09-30 Qualcomm, Incorporated Method and apparatus for demodulating signals processed in a transmit diversity mode
GB0016663D0 (en) * 2000-07-06 2000-08-23 Nokia Networks Oy Receiver and method of receiving
SE0002587D0 (sv) * 2000-07-07 2000-07-07 Ericsson Telefon Ab L M Rake receiver and method related to a rake receiver
US6859652B2 (en) * 2000-08-02 2005-02-22 Mobile Satellite Ventures, Lp Integrated or autonomous system and method of satellite-terrestrial frequency reuse using signal attenuation and/or blockage, dynamic assignment of frequencies and/or hysteresis
US6959033B1 (en) * 2000-08-25 2005-10-25 Texas Instruments Incorporated System and method for assigning combiner channels in spread spectrum communications
US6721295B1 (en) 2000-08-25 2004-04-13 Texas Instruments Incorporated Triple data system for high data rate communication systems
GB0022634D0 (en) * 2000-09-15 2000-11-01 Koninkl Philips Electronics Nv Secondary station and method of operating the station
US6847677B1 (en) * 2000-09-29 2005-01-25 Qualcomm, Incorporated Method and apparatus for efficient Walsh covering and summing of signals in a communication system
US6636488B1 (en) 2000-10-11 2003-10-21 Aperto Networks, Inc. Automatic retransmission and error recovery for packet oriented point-to-multipoint communication
GB2368238B (en) * 2000-10-17 2004-04-14 Ubinetics Ltd A method of searching a code space
US6973098B1 (en) * 2000-10-25 2005-12-06 Qualcomm, Incorporated Method and apparatus for determining a data rate in a high rate packet data wireless communications system
US7068683B1 (en) 2000-10-25 2006-06-27 Qualcomm, Incorporated Method and apparatus for high rate packet data and low delay data transmissions
US6985516B1 (en) 2000-11-27 2006-01-10 Qualcomm Incorporated Method and apparatus for processing a received signal in a communications system
US8155096B1 (en) 2000-12-01 2012-04-10 Ipr Licensing Inc. Antenna control system and method
JP3510589B2 (ja) * 2000-12-15 2004-03-29 Ｎｅｃエレクトロニクス株式会社 セルサーチ方法およびセルサーチ装置
US6834075B2 (en) * 2001-01-12 2004-12-21 Motorola, Inc. Method for improving multipath searcher speed
JP3838877B2 (ja) * 2001-01-15 2006-10-25 日本電気株式会社 パスサーチを行うｃｄｍａ受信装置、パスサーチ方法、及びプログラム
US7551663B1 (en) 2001-02-01 2009-06-23 Ipr Licensing, Inc. Use of correlation combination to achieve channel detection
US6954448B2 (en) 2001-02-01 2005-10-11 Ipr Licensing, Inc. Alternate channel for carrying selected message types
US7110349B2 (en) 2001-03-06 2006-09-19 Brn Phoenix, Inc. Adaptive communications methods for multiple user packet radio wireless networks
US6700922B2 (en) * 2001-04-09 2004-03-02 Raghu Challa System and method for acquiring a received signal in a spread spectrum device
JP3628977B2 (ja) * 2001-05-16 2005-03-16 松下電器産業株式会社 無線基地局装置及び通信端末装置
US6834074B2 (en) * 2001-05-23 2004-12-21 Texas Instruments Incorporated Method of time tracking in a vector correlator based rake receiver
ES2626289T3 (es) 2001-06-13 2017-07-24 Intel Corporation Método y aparatos para la transmisión de señal de latido a un nivel más bajo que la solicitud de latido
US7095987B2 (en) * 2001-11-15 2006-08-22 Texas Instruments Incorporated Method and apparatus for received uplinked-signal based adaptive downlink diversity within a communication system
US7474994B2 (en) * 2001-12-14 2009-01-06 Qualcomm Incorporated System and method for wireless signal time of arrival
US7738533B2 (en) * 2002-01-07 2010-06-15 Qualcomm Incorporated Multiplexed CDMA and GPS searching
US7215935B2 (en) * 2002-01-17 2007-05-08 Qualcomm Incorporated Segmented CDMA searching
US7463671B2 (en) * 2002-02-19 2008-12-09 Marvell World Trade Ltd. Rake receiver interface
US8194770B2 (en) 2002-08-27 2012-06-05 Qualcomm Incorporated Coded MIMO systems with selective channel inversion applied per eigenmode
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
US7324429B2 (en) 2002-10-25 2008-01-29 Qualcomm, Incorporated Multi-mode terminal in a wireless MIMO system
US8170513B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US8134976B2 (en) 2002-10-25 2012-03-13 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
US8218609B2 (en) 2002-10-25 2012-07-10 Qualcomm Incorporated Closed-loop rate control for a multi-channel communication system
US7002900B2 (en) 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US8169944B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Random access for wireless multiple-access communication systems
US20040181777A1 (en) * 2003-03-14 2004-09-16 Swee-Koon Fam Method and device for programming electronic devices using a uniform parameter format
US7672404B2 (en) * 2003-05-19 2010-03-02 Broadcom Corporation Method and apparatus for reducing the time required to acquire a GPS signal
US7298777B2 (en) * 2003-06-06 2007-11-20 Texas Instruments Incorporated Searching in a spread spectrum communications
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US7129753B2 (en) * 2004-05-26 2006-10-31 Infineon Technologies Ag Chip to chip interface
US8027372B2 (en) 2004-06-18 2011-09-27 Qualcomm Incorporated Signal acquisition in a wireless communication system
US7558591B2 (en) * 2004-10-12 2009-07-07 Magnolia Broadband Inc. Determining a power control group boundary of a power control group
US7466749B2 (en) 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
US8358714B2 (en) 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
TWI324469B (en) * 2006-01-13 2010-05-01 Via Tech Inc Method and apparatus for delaying sampled signal
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
US8738056B2 (en) 2006-05-22 2014-05-27 Qualcomm Incorporation Signal acquisition in a wireless communication system
US8929353B2 (en) 2007-05-09 2015-01-06 Qualcomm Incorporated Preamble structure and acquisition for a wireless communication system
CN101467413B (zh) 2006-06-13 2013-08-21 高通股份有限公司 用于在无线通信系统中发送和接收导频的方法和装置
US20080080444A1 (en) * 2006-09-28 2008-04-03 Analog Devices, Inc. Transport channel buffer organization in downlink receiver bit rate processor
US8265178B2 (en) 2006-11-07 2012-09-11 Qualcomm Incorporated Methods and apparatus for signal and timing detection in wireless communication systems
JP4913018B2 (ja) * 2007-11-12 2012-04-11 富士通株式会社 逆拡散回路および電子機器
US8532201B2 (en) 2007-12-12 2013-09-10 Qualcomm Incorporated Methods and apparatus for identifying a preamble sequence and for estimating an integer carrier frequency offset
US8537931B2 (en) 2008-01-04 2013-09-17 Qualcomm Incorporated Methods and apparatus for synchronization and detection in wireless communication systems
KR100913099B1 (ko) 2008-01-07 2009-08-21 엘지전자 주식회사 분산형 가상자원블록 스케쥴링 방법
RU2488219C2 (ru) * 2008-01-07 2013-07-20 Эл Джи Электроникс Инк. Способ планирования распределенных блоков виртуальных ресурсов
KR100925441B1 (ko) 2008-01-07 2009-11-06 엘지전자 주식회사 분산형 가상자원블록 스케쥴링 방법
KR100904433B1 (ko) 2008-01-07 2009-06-24 엘지전자 주식회사 분산형 가상자원블록 스케쥴링 방법
US8811200B2 (en) * 2009-09-22 2014-08-19 Qualcomm Incorporated Physical layer metrics to support adaptive station-dependent channel state information feedback rate in multi-user communication systems
RU2553282C2 (ru) * 2009-09-24 2015-06-10 Эппл Инк Способы радиосвязи (варианты), ретранслятор и мобильная станция (варианты)
EP2486666B1 (en) * 2009-10-05 2019-07-03 Koninklijke Philips N.V. A method for signalling a precoding in a cooperative beamforming transmission mode
CN103248396B (zh) * 2012-02-02 2016-09-07 中兴通讯股份有限公司 多径搜索的方法及装置
US10356800B2 (en) * 2016-05-09 2019-07-16 Qualcomm Incorporated Scalable numerology with symbol boundary alignment for uniform and non-uniform symbol duration in wireless communication
RU2660629C1 (ru) * 2017-06-22 2018-07-06 Закрытое акционерное общество Научно-технический центр "Модуль" Способ быстрого декодирования информационных элементов сигнала
CN112383494B (zh) * 2020-11-26 2022-10-28 西安烽火电子科技有限责任公司 基于dsss-oqpsk的猝发通信接收系统

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
US5446756A (en) * 1990-03-19 1995-08-29 Celsat America, Inc. Integrated cellular communications system
US5297161A (en) * 1992-06-29 1994-03-22 Motorola Inc. Method and apparatus for power estimation in an orthogonal coded communication system
JP3295454B2 (ja) * 1992-08-05 2002-06-24 パイオニア株式会社 Ｇｐｓ受信機の信号処理方法
CZ284419B6 (cs) * 1992-10-01 1998-11-11 Motorola, Inc. Způsob vyžádání informace z komunikačního systému a přijímač selektivního volání schopný vyžádání této informace
GB9311373D0 (en) * 1993-06-02 1993-07-21 Roke Manor Research Apparatus for use in equipment providing a digital radio link between a fixed and a mobile radio unit
US5442627A (en) * 1993-06-24 1995-08-15 Qualcomm Incorporated Noncoherent receiver employing a dual-maxima metric generation process
US5412686A (en) * 1993-09-17 1995-05-02 Motorola Inc. Method and apparatus for power estimation in a communication system
US5490165A (en) * 1993-10-28 1996-02-06 Qualcomm Incorporated Demodulation element assignment in a system capable of receiving multiple signals
US5710768A (en) * 1994-09-30 1998-01-20 Qualcomm Incorporated Method of searching for a bursty signal
MY120873A (en) * 1994-09-30 2005-12-30 Qualcomm Inc Multipath search processor for a spread spectrum multiple access communication system
US5654979A (en) * 1995-01-13 1997-08-05 Qualcomm Incorporated Cell site demodulation architecture for a spread spectrum multiple access communication systems

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AU699159B2 (en) 1998-11-26
IL118116A0 (en) 1996-09-12
CN1099171C (zh) 2003-01-15
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AU6145896A (en) 1996-11-21
DE69624698T2 (de) 2003-08-21
MX9708514A (es) 1998-02-28
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RU2157592C2 (ru) 2000-10-10
JPH11505083A (ja) 1999-05-11
JP3388754B2 (ja) 2003-03-24
ES2184871T3 (es) 2003-04-16
HK1017523A1 (en) 1999-11-19
KR100380427B1 (ko) 2003-07-22
ATE227481T1 (de) 2002-11-15
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EP0824802B1 (en) 2002-11-06
ZA963188B (en) 1996-10-23
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EP0824802A1 (en) 1998-02-25
US5867527A (en) 1999-02-02
IL118116A (en) 2000-06-01
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US5710768A (en) 1998-01-20
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