AR017828A1 - Una disposicion para la demodulacion de un juego de senales de acceso multiple por division de codigo (cdma) y un metodo para demodular un juego de senales(cdma) que utiliza dicha disposicion - Google Patents

Una disposicion para la demodulacion de un juego de senales de acceso multiple por division de codigo (cdma) y un metodo para demodular un juego de senales(cdma) que utiliza dicha disposicion

Info

Publication number
AR017828A1
AR017828A1 ARP980106230A ARP980106230A AR017828A1 AR 017828 A1 AR017828 A1 AR 017828A1 AR P980106230 A ARP980106230 A AR P980106230A AR P980106230 A ARP980106230 A AR P980106230A AR 017828 A1 AR017828 A1 AR 017828A1
Authority
AR
Argentina
Prior art keywords
cdma
provision
demodulator
search engine
reverse link
Prior art date
Application number
ARP980106230A
Other languages
English (en)
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 AR017828A1 publication Critical patent/AR017828A1/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
    • H04B1/7097—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

Una disposicion para la demodulacion de un juego de senales de Acceso Multiple por Division de Codigo (CDMA). La disposicion realiza el procesamientodigital de recepcion para multiples senales recibidas por la misma banda de RF. En unaimplementacio n preferida de la invencion, las muestras digitales de RFson almacenadas en una cola la cual es accedida por el buscador (130) y un demodulador (112). El buscador (130) y el demodulador (112) están preferiblementeubicados en el mismocircuito integra do junto con la cola. El demodulador (112) demodula un juego de senales de enlace inverso almacenadas dentro de la coladonde cada senal de enlace inverso es recibida con un desplazamiento (offset) de tiempo particular y es procesadausando un codigo de canal particular. Elbuscador (1130) busca periodicamente senales de enlace inverso que no están siendo procesadas por el demodulador (112), y peticiones de acceso transmitidas víael canal de acceso. El buscador (130)preferiblemente busca durante los grupos de control de potencia dignos de cada senal de enlace inverso, lo cualcorresponde a dos de los dieciséis grupos de control de potencia transmitidos durante una trama de velocidad un octavo. La invenciontambién propone a unmétodo para demo dular un juego de senales (CDMA) que utiliza dicha disposicion.
ARP980106230A 1997-12-09 1998-12-09 Una disposicion para la demodulacion de un juego de senales de acceso multiple por division de codigo (cdma) y un metodo para demodular un juego de senales(cdma) que utiliza dicha disposicion AR017828A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/987,172 US6639906B1 (en) 1997-12-09 1997-12-09 Multichannel demodulator

Publications (1)

Publication Number Publication Date
AR017828A1 true AR017828A1 (es) 2001-10-24

Family

ID=25533076

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP980106230A AR017828A1 (es) 1997-12-09 1998-12-09 Una disposicion para la demodulacion de un juego de senales de acceso multiple por division de codigo (cdma) y un metodo para demodular un juego de senales(cdma) que utiliza dicha disposicion

Country Status (13)

Country Link
US (1) US6639906B1 (es)
EP (2) EP1040594A1 (es)
JP (2) JP4316134B2 (es)
KR (1) KR100582217B1 (es)
CN (1) CN1284218A (es)
AR (1) AR017828A1 (es)
AU (1) AU1808799A (es)
BR (1) BRPI9813494B1 (es)
CA (1) CA2313453A1 (es)
FI (1) FI20001304L (es)
MY (1) MY122091A (es)
WO (1) WO1999030433A1 (es)
ZA (1) ZA9811126B (es)

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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
DE59912436D1 (de) * 1998-10-27 2005-09-22 Siemens Ag Verfahren zum steuern von speicherzugriffen bei "rake"-empfängern mit "early-late tracking" in telekommunikationssystemen
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
US7065128B2 (en) * 2000-07-31 2006-06-20 Infineon Technologies Ag 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
CN1575615B (zh) * 2001-05-14 2013-05-29 爱立信股份有限公司 用于在tdma系统中保留时隙的方法和系统
US7649860B2 (en) * 2002-01-31 2010-01-19 Qualcomm Incorporated Buffer-based GPS and CDMA pilot searcher
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US6785322B1 (en) 2002-04-12 2004-08-31 Interdigital Technology Corporation Node-B/base station rake finger pooling
US20050219975A1 (en) * 2002-06-28 2005-10-06 Koninklijke Philips Electronics N.V. Method and arrangement for the generation of an identification data block
US7016697B2 (en) * 2002-10-29 2006-03-21 Qualcomm Incorporated Controlling multiple modems in a wireless terminal using dynamically varying modem transmit power limits
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
WO2007136415A2 (en) 2005-12-30 2007-11-29 Comtech Mobile Datacom Corporation Mobile satellite communications
TWI387245B (zh) * 2006-07-24 2013-02-21 Qualcomm Inc 已結構化的碼之碼交錯
US8295250B2 (en) * 2006-07-24 2012-10-23 Qualcomm Incorporated Code interleaving for a structured code
US8275080B2 (en) 2006-11-17 2012-09-25 Comtech Mobile Datacom Corporation Self-supporting simplex packets
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US8675711B1 (en) 2009-09-25 2014-03-18 Comtech Mobile Datacom Corporation System and methods for dynamic spread spectrum usage
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Also Published As

Publication number Publication date
EP2204917A3 (en) 2013-02-27
MY122091A (en) 2006-03-31
EP2204917A2 (en) 2010-07-07
JP2009219125A (ja) 2009-09-24
AU1808799A (en) 1999-06-28
JP4477691B2 (ja) 2010-06-09
JP4316134B2 (ja) 2009-08-19
EP1040594A1 (en) 2000-10-04
JP2001526489A (ja) 2001-12-18
US6639906B1 (en) 2003-10-28
KR20010032961A (ko) 2001-04-25
BRPI9813494B1 (pt) 2015-08-25
CA2313453A1 (en) 1999-06-17
FI20001304A7 (fi) 2000-08-09
ZA9811126B (en) 2000-10-10
BR9813494A (pt) 2000-11-14
FI20001304L (fi) 2000-08-09
WO1999030433A1 (en) 1999-06-17
KR100582217B1 (ko) 2006-05-24
CN1284218A (zh) 2001-02-14

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