BR9813494A - Demodulador de espectro espalhado e múltiplas trajetórias para um sistema de comunicação de múltiplos canais - Google Patents

Demodulador de espectro espalhado e múltiplas trajetórias para um sistema de comunicação de múltiplos canais

Info

Publication number
BR9813494A
BR9813494A BR9813494-9A BR9813494A BR9813494A BR 9813494 A BR9813494 A BR 9813494A BR 9813494 A BR9813494 A BR 9813494A BR 9813494 A BR9813494 A BR 9813494A
Authority
BR
Brazil
Prior art keywords
demodulator
researcher
queue
callback
communication system
Prior art date
Application number
BR9813494-9A
Other languages
English (en)
Other versions
BRPI9813494B1 (pt
Inventor
Jeffrey A Levin
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 BR9813494A publication Critical patent/BR9813494A/pt
Publication of BRPI9813494B1 publication Critical patent/BRPI9813494B1/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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • 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
    • 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
    • H04B1/70753—Partial phase search
    • 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
    • H04B1/708—Parallel implementation
    • 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
    • H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
    • 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
    • H04B1/7073—Synchronisation aspects
    • H04B1/70735—Code identification
    • 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
    • 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
    • H04B1/709—Correlator structure
    • H04B1/7093—Matched filter type
    • H04B2001/70935—Matched filter type using a bank of matched fileters, e.g. Fast Hadamard Transform

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Relay Systems (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)

Abstract

Patente de Invenção: DEMODULADOR DE ESPECTRO ESPALHADO E MúLTIPLAS TRAJETóRIAS PARA UM SISTEMA DE COMUNICAçãO DE MúLTIPLOS CANAIS. São descritos um sistema e um método para efetuar o processamento de recepção digital para múltiplos sinais através da mesma banda de RF. Em uma modalidade preferida da invenção, amostras digitais de RF são armazenadas em uma fila que é acessada por um pesquisador (130) e um demodulador (112). O pesquisador (130) e o demodulador (112) estão de preferência localizados no mesmo circuito integrado juntamente com a fila. O demodulador (112) demodula um conjunto de sinais de ligação de retorno armazenados dentro da fila, em que cada sinal de ligação de retorno é recebido com um offset de tempo específico e processado usando-se um código de canal específico. O pesquisador (130) periodicamente procura sinais de ligação de retorno que não estão sendo processados pelo demodulador (112) e requisições de acesso transmitidas através do canal de acesso. O pesquisador (130) procura de preferência durante os grupos de controle de potência de valia de cada sinal de ligação de retorno, o que corresponde a dois dos dezesseis grupos de controle de potência transmitidos durante um quadro de oitavo de taxa.
BRPI9813494-9A 1997-12-09 1998-12-08 "sistema e método para processar um conjunto de sinais de link reverso provenientes de um conjunto de unidades móveis" BRPI9813494B1 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/987,172 US6639906B1 (en) 1997-12-09 1997-12-09 Multichannel demodulator
PCT/US1998/026050 WO1999030433A1 (en) 1997-12-09 1998-12-08 Spread spectrum multipath demodulator for a multichanel communication system

Publications (2)

Publication Number Publication Date
BR9813494A true BR9813494A (pt) 2000-11-14
BRPI9813494B1 BRPI9813494B1 (pt) 2015-08-25

Family

ID=25533076

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI9813494-9A BRPI9813494B1 (pt) 1997-12-09 1998-12-08 "sistema e método para processar um conjunto de sinais de link reverso provenientes de um conjunto de unidades móveis"

Country Status (13)

Country Link
US (1) US6639906B1 (pt)
EP (2) EP2204917A3 (pt)
JP (2) JP4316134B2 (pt)
KR (1) KR100582217B1 (pt)
CN (1) CN1284218A (pt)
AR (1) AR017828A1 (pt)
AU (1) AU1808799A (pt)
BR (1) BRPI9813494B1 (pt)
CA (1) CA2313453A1 (pt)
FI (1) FI20001304A (pt)
MY (1) MY122091A (pt)
WO (1) WO1999030433A1 (pt)
ZA (1) ZA9811126B (pt)

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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
US6408003B1 (en) * 1997-06-17 2002-06-18 Qualcomm Incorporated Method and apparatus for resolving ambiguity in reception of multiple retransmitted frames
US6396819B1 (en) 1998-03-21 2002-05-28 Richard D. Fleeter Low-cost satellite communication system
US7593408B2 (en) * 1998-05-20 2009-09-22 Qualcomm Incorporated Method and apparatus for resolving ambiguity in reception of multiple retransmitted frames
JP3795756B2 (ja) * 1998-10-27 2006-07-12 シーメンス アクチエンゲゼルシヤフト 移動局及び／又は固定送信局／受信局間でワイヤレス電気通信を行う電気通信システム、”アーリー／レートトラッキング”を有する”ｒａｋｅ”−受信機でのメモリアクセスの制御方法
US6314130B1 (en) * 1999-04-28 2001-11-06 Dspc Technologies, Ltd. System and method for joint time tracking of multiple paths
US7031271B1 (en) 1999-05-19 2006-04-18 Motorola, Inc. Method of and apparatus for activating a spread-spectrum radiotelephone
US7085246B1 (en) 1999-05-19 2006-08-01 Motorola, Inc. Method and apparatus for acquisition of a spread-spectrum signal
GB2351864B (en) 1999-07-05 2004-05-26 Symmetricom Inc A receiver for receiving rf pseudo-random encoded signals
US6529487B1 (en) * 1999-07-09 2003-03-04 Qualcomm Incorporated Method and apparatus for securely transmitting distributed RAND for use in mobile station authentication
JP3399420B2 (ja) * 1999-11-01 2003-04-21 日本電気株式会社 固定パターン検出装置
US7433391B2 (en) * 2000-02-28 2008-10-07 Aeroastro, Inc. Spread-spectrum receiver with fast M-sequence transform
US7227884B2 (en) 2000-02-28 2007-06-05 Aeroastro, Inc. Spread-spectrum receiver with progressive fourier transform
DE10013798C1 (de) * 2000-03-20 2001-09-20 Siemens Ag Verfahren zur Überwachung der Übertragungsqualität in einem zellularen Funk-Kommunikationssystem
US7224719B1 (en) 2000-03-31 2007-05-29 Qualcomm, Incorporated Fast acquisition of a pilot signal in a wireless communication device
EP1317833B1 (en) * 2000-07-31 2013-04-17 Intel Mobile Communications GmbH Apparatus and methods for sample selection and reuse of rake fingers in spread spectrum systems
KR100355270B1 (ko) * 2000-10-11 2002-10-11 한국전자통신연구원 시분할 방법을 이용하는 핑거와, 이를 구비한 레이크 수신기
US7590164B2 (en) * 2001-01-19 2009-09-15 Qualcomm Incorporated Method and apparatus for efficient use of communication resources in a communication system
KR20020084464A (ko) * 2001-05-02 2002-11-09 엘지전자 주식회사 Ｃｄｍａ 복조 시스템
DE60234027D1 (de) * 2001-05-14 2009-11-26 Ericsson Ab Verfahren und system zur reservierung von zeitschlitzen in einem tdma system
US7649860B2 (en) * 2002-01-31 2010-01-19 Qualcomm Incorporated Buffer-based GPS and CDMA pilot searcher
TWI259011B (en) 2002-04-12 2006-07-21 Interdigital Tech Corp Access burst detector correlator pool
US6785322B1 (en) * 2002-04-12 2004-08-31 Interdigital Technology Corporation Node-B/base station rake finger pooling
AU2003242923A1 (en) * 2002-06-28 2004-01-19 Koninklijke Philips Electronics N.V. Method and arrangement for the generation of an identification data block
JP4297780B2 (ja) 2003-12-22 2009-07-15 株式会社ルネサステクノロジ 受信装置
US20050169353A1 (en) * 2004-02-02 2005-08-04 Wei An Post despreading interpolation in CDMA systems
FI20050977A0 (fi) * 2005-09-29 2005-09-29 Nokia Corp Synkronointimenetelmä, vastaanotin, verkkoelementti, viestintäväline, elektroninen väline, tietokoneohjelmatuote ja tietokoneohjelmien jakeluväline
US7592953B2 (en) 2005-12-30 2009-09-22 Comtech Mobile Datacom Corporation Mobile satellite communications
US8295250B2 (en) * 2006-07-24 2012-10-23 Qualcomm Incorporated Code interleaving for a structured code
CN101496330B (zh) * 2006-07-24 2013-11-06 高通股份有限公司 用于沃尔什编码的编码交织
US8275080B2 (en) 2006-11-17 2012-09-25 Comtech Mobile Datacom Corporation Self-supporting simplex packets
US8284749B2 (en) * 2008-03-10 2012-10-09 Comtech Mobile Datacom Corporation Time slot synchronized, flexible bandwidth communication system
US9106364B1 (en) 2009-01-26 2015-08-11 Comtech Mobile Datacom Corporation Signal processing of a high capacity waveform
US8548107B1 (en) 2009-01-26 2013-10-01 Comtech Mobile Datacom Corporation Advanced multi-user detector
US8675711B1 (en) 2009-09-25 2014-03-18 Comtech Mobile Datacom Corporation System and methods for dynamic spread spectrum usage
US9042429B2 (en) * 2013-06-27 2015-05-26 Intel Mobile Communications GmbH Interference cancellation radio receiver

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US5109390A (en) * 1989-11-07 1992-04-28 Qualcomm Incorporated Diversity receiver in a cdma cellular telephone system
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Also Published As

Publication number Publication date
AU1808799A (en) 1999-06-28
FI20001304A (fi) 2000-08-09
MY122091A (en) 2006-03-31
EP2204917A3 (en) 2013-02-27
ZA9811126B (en) 2000-10-10
EP2204917A2 (en) 2010-07-07
JP2009219125A (ja) 2009-09-24
CN1284218A (zh) 2001-02-14
AR017828A1 (es) 2001-10-24
JP4477691B2 (ja) 2010-06-09
WO1999030433A1 (en) 1999-06-17
KR20010032961A (ko) 2001-04-25
KR100582217B1 (ko) 2006-05-24
CA2313453A1 (en) 1999-06-17
JP4316134B2 (ja) 2009-08-19
US6639906B1 (en) 2003-10-28
BRPI9813494B1 (pt) 2015-08-25
JP2001526489A (ja) 2001-12-18
EP1040594A1 (en) 2000-10-04

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Legal Events

Date Code Title Description
B07A Application suspended after technical examination (opinion) [chapter 7.1 patent gazette]
B09A Decision: intention to grant [chapter 9.1 patent gazette]
B16A Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]

Free format text: PRAZO DE VALIDADE: 10 (DEZ) ANOS CONTADOS A PARTIR DE 25/08/2015, OBSERVADAS AS CONDICOES LEGAIS.