AR003021A1 - Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro. - Google Patents

Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro.

Info

Publication number
AR003021A1
AR003021A1 ARP960103720A AR10372096A AR003021A1 AR 003021 A1 AR003021 A1 AR 003021A1 AR P960103720 A ARP960103720 A AR P960103720A AR 10372096 A AR10372096 A AR 10372096A AR 003021 A1 AR003021 A1 AR 003021A1
Authority
AR
Argentina
Prior art keywords
symbol
direct sequence
spectrum signal
spectrum
decreasing
Prior art date
Application number
ARP960103720A
Other languages
English (en)
Inventor
Arthur Ross
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 AR003021A1 publication Critical patent/AR003021A1/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
    • H04B1/7097—Interference-related aspects
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L25/03012—Arrangements for removing intersymbol interference operating in the time domain
    • H04L25/03019—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception
    • H04L25/03038—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/0335—Arrangements for removing intersymbol interference characterised by the type of transmission
    • H04L2025/03375—Passband transmission
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03433—Arrangements for removing intersymbol interference characterised by equaliser structure
    • H04L2025/03439—Fixed structures
    • H04L2025/03445—Time domain
    • H04L2025/03471—Tapped delay lines
    • H04L2025/03477—Tapped delay lines not time-recursive
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006—Arrangements for removing intersymbol interference
    • H04L2025/03592—Adaptation methods
    • H04L2025/03598—Algorithms
    • H04L2025/03611—Iterative algorithms
    • H04L2025/03617—Time recursive algorithms

Abstract

El presente invento comprende un método y un aparato para des-extender en forma adaptable una senal de espectro extendido de secuencia directa. La senalde espectro extendido de secuencia directa se proporciona a un filtro transversal 101.La salida del filtro 101 es des-extendida por un des-extensor120 para obtener un símbolo blando determinado por un estimador de símbolos 122. El símbolo blando se proporciona a un circuito de decisión 124 que generauna versión con corrección deerrores de los datos del símbolo blando, denominada símbolo duro. El valor del símbolo duro se resta del símbolo blandopor sustractor 126 para generar un símbolo de error. Este símbolo de error se usa posteriormente para computar valores de derivación del filtro transversalpor medio de un algoritmo de medias cuadráticas mínimas (MCM) empleado por el adaptador de derivación 103.
ARP960103720A 1995-07-31 1996-07-24 Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro. AR003021A1 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US08/509,722 US5692006A (en) 1995-07-31 1995-07-31 Adaptive despreader

Publications (1)

Publication Number Publication Date
AR003021A1 true AR003021A1 (es) 1998-05-27

Family

ID=24027839

Family Applications (1)

Application Number Title Priority Date Filing Date
ARP960103720A AR003021A1 (es) 1995-07-31 1996-07-24 Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro.

Country Status (17)

Country Link
US (1) US5692006A (es)
EP (1) EP0842568B1 (es)
JP (2) JP3241739B2 (es)
KR (1) KR19990036012A (es)
CN (1) CN1091554C (es)
AR (1) AR003021A1 (es)
AT (1) ATE279814T1 (es)
AU (1) AU6715896A (es)
BR (1) BR9609939A (es)
CA (1) CA2228131A1 (es)
DE (1) DE69633625T2 (es)
FI (1) FI980162A (es)
HK (1) HK1010952A1 (es)
MX (1) MX9800853A (es)
TW (1) TW322667B (es)
WO (1) WO1997005709A1 (es)
ZA (1) ZA966011B (es)

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH09116475A (ja) * 1995-10-23 1997-05-02 Nec Corp 時間ダイバーシチ送受信システム
JP3310160B2 (ja) * 1996-03-29 2002-07-29 松下電器産業株式会社 スペクトラム拡散方式受信装置
US6510687B1 (en) 1996-06-14 2003-01-28 Sharav Sluices Ltd. Renewable resource hydro/aero-power generation plant and method of generating hydro/aero-power
JP3323067B2 (ja) * 1996-07-12 2002-09-09 沖電気工業株式会社 Ｃｄｍａ受信装置
US6496543B1 (en) 1996-10-29 2002-12-17 Qualcomm Incorporated Method and apparatus for providing high speed data communications in a cellular environment
US5912825A (en) * 1997-02-27 1999-06-15 Eg&G Instruments, Inc. Gated base line restorer system
US6085114A (en) 1997-02-06 2000-07-04 At&T Wireless Systems Inc. Remote wireless unit having reduced power operating mode
US6501771B2 (en) 1997-02-11 2002-12-31 At&T Wireless Services, Inc. Delay compensation
US5933421A (en) 1997-02-06 1999-08-03 At&T Wireless Services Inc. Method for frequency division duplex communications
WO1998037653A2 (en) * 1997-02-19 1998-08-27 At & T Wireless Services, Inc. Remote wireless unit having reduced power operating mode for a discrete multitone spread spectrum communications system
US6359923B1 (en) 1997-12-18 2002-03-19 At&T Wireless Services, Inc. Highly bandwidth efficient communications
US5923700A (en) * 1997-02-24 1999-07-13 At & T Wireless Adaptive weight update method and system for a discrete multitone spread spectrum communications system
US6128276A (en) 1997-02-24 2000-10-03 Radix Wireless, Inc. Stacked-carrier discrete multiple tone communication technology and combinations with code nulling, interference cancellation, retrodirective communication and adaptive antenna arrays
US5889814A (en) * 1997-02-24 1999-03-30 At&T Wireless Services, Inc. Transmit/receive compensation for a dual FDD/TDD architecture
WO1998037654A2 (en) 1997-02-24 1998-08-27 At & T Wireless Services, Inc. Vertical adaptive antenna array for a discrete multitone spread spectrum communications system
US6289037B1 (en) 1997-02-24 2001-09-11 At&T Wireless Services Inc. Out of channel cyclic redundancy code method for a discrete multitone spread spectrum communications system
WO1998037638A2 (en) * 1997-02-24 1998-08-27 At & T Wireless Services, Inc. Highly bandwidth-efficient communications
US5864543A (en) * 1997-02-24 1999-01-26 At&T Wireless Services, Inc. Transmit/receive compensation in a time division duplex system
US6408016B1 (en) 1997-02-24 2002-06-18 At&T Wireless Services, Inc. Adaptive weight update method and system for a discrete multitone spread spectrum communications system
US6429400B1 (en) 1997-12-03 2002-08-06 Matsushita Electric Works Ltd. Plasma processing apparatus and method
US6175588B1 (en) * 1997-12-30 2001-01-16 Motorola, Inc. Communication device and method for interference suppression using adaptive equalization in a spread spectrum communication 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
US6240133B1 (en) 1998-02-05 2001-05-29 Texas Instruments Incorporated High stability fast tracking adaptive equalizer for use with time varying communication channels
US6366607B1 (en) * 1998-05-14 2002-04-02 Interdigital Technology Corporation Processing for improved performance and reduced pilot
DE69835874T2 (de) * 1998-07-13 2007-04-12 Hewlett-Packard Development Co., L.P., Houston Chipströmedekodierung
FR2782585B1 (fr) 1998-08-20 2000-09-22 France Telecom Recepteur en rateau iteratif et procede de reception correspondant
EP0997926B1 (en) 1998-10-26 2006-01-04 Matsushita Electric Works, Ltd. Plasma treatment apparatus and method
US6438156B1 (en) * 1999-02-11 2002-08-20 Adtran, Inc. Stepwise adaptive finite impulse response filter for spread spectrum radio
GB9904421D0 (en) * 1999-02-25 1999-04-21 Univ Edinburgh Telecommunications receiver
US6314130B1 (en) 1999-04-28 2001-11-06 Dspc Technologies, Ltd. System and method for joint time tracking of multiple paths
US6760438B1 (en) * 1999-07-01 2004-07-06 Nortel Networks Limited System and method for Viterbi decoding on encrypted data
EP1073210B1 (fr) 1999-07-30 2007-03-14 Koninklijke Philips Electronics N.V. Appareil de transmission de données par étalement de spectre comportant un récepteur de données
JP4221847B2 (ja) 1999-10-25 2009-02-12 パナソニック電工株式会社 プラズマ処理装置及びプラズマ点灯方法
US6944217B1 (en) 2000-02-01 2005-09-13 International Business Machines Corporation Interleaved finite impulse response filter
US7006581B2 (en) * 2000-05-25 2006-02-28 Vigil Armando J Method for demodulating a digital signal subjected to multipath propagation impairment and an associated receiver
US6522683B1 (en) 2000-08-10 2003-02-18 Qualcomm, Incorporated Method and apparatus for adaptive linear equalization for walsh covered modulation
US6744806B1 (en) * 2000-09-13 2004-06-01 Ut-Battelle, L.L.C. Fast-synchronizing high-fidelity spread-spectrum receiver
US7218666B2 (en) * 2000-12-29 2007-05-15 Motorola, Inc. Method and system for transmission and frequency domain equalization for wideband CDMA system
US20020191568A1 (en) * 2001-03-29 2002-12-19 Koninklijke Philips Electronics N.V. Adaptive chip equalizers for synchronous DS-CDMA systems with pilot sequences
SG122753A1 (en) * 2001-11-30 2006-06-29 Sony Corp Advanced receiver for CDMA downlink
US6912244B2 (en) * 2002-01-31 2005-06-28 Qualcomm Inc. Pilot frequency acquisition based on a window of data samples
US7305020B2 (en) * 2002-02-04 2007-12-04 Vizionware, Inc. Method and system of reducing electromagnetic interference emissions
JP2004040305A (ja) * 2002-07-01 2004-02-05 Fujitsu Ltd Ｃｄｍａ受信装置及びその方法
US7301993B2 (en) * 2002-09-13 2007-11-27 Broadcom Corporation Channel estimation in a spread spectrum receiver
US7406066B2 (en) * 2002-10-09 2008-07-29 Yi Zheng Asynchronous modulation and demodulation for spread spectrum and code-division multiple access communication
US20050105591A1 (en) * 2003-02-28 2005-05-19 Xemi, Inc. Noise source synchronization for power spread signals
US7437135B2 (en) 2003-10-30 2008-10-14 Interdigital Technology Corporation Joint channel equalizer interference canceller advanced receiver
US7400692B2 (en) 2004-01-14 2008-07-15 Interdigital Technology Corporation Telescoping window based equalization
US20050249274A1 (en) * 2004-05-10 2005-11-10 Larosa Christopher P Linear filter equalizer
US20070206641A1 (en) * 2005-11-10 2007-09-06 X-Emi, Inc. Encoding and deserialization-serialization for digital signals
US7649932B2 (en) * 2005-11-30 2010-01-19 Microtune (Texas), L.P. Segmented equalizer
US7885929B2 (en) 2006-01-03 2011-02-08 Motio, Inc. Continuous integration of business intelligence software
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
BRPI0622124A2 (pt) 2006-11-14 2011-12-27 Intel Corp decodificador espaÇo-tempo e mÉtodos de decodificaÇço de sinais codificados alamouti em ambientes de alto doppler
US20080250175A1 (en) * 2007-04-03 2008-10-09 Vizionware, Inc. Cable assembly having an adaptive two-wire bus
US20080246626A1 (en) * 2007-04-03 2008-10-09 Vizionware, Inc. Data transaction direction detection in an adaptive two-wire bus
US20080250184A1 (en) * 2007-04-03 2008-10-09 Vizionware, Inc. Adaptive two-wire bus
US20080250170A1 (en) * 2007-04-03 2008-10-09 Vizionware, Inc. Clock mode detection in an adaptive two-wire bus
US20080247414A1 (en) * 2007-04-03 2008-10-09 Vizionware, Inc. Clock stretching in an adaptive two-wire bus
US20090266853A1 (en) * 2008-04-23 2009-10-29 Emanuele Bianchi Self-looping portable container and dispensing apparatus
US8743848B2 (en) * 2009-05-26 2014-06-03 Broadcom Corporation Hybrid location determination for wireless communication device
US8229041B2 (en) * 2009-05-26 2012-07-24 Broadcom Corporation Direct detection of wireless interferers in a communication device for multiple modulation types
US9648444B2 (en) 2014-01-06 2017-05-09 Brian G. Agee Physically secure digital signal processing for wireless M2M networks
US10812955B2 (en) 2013-01-05 2020-10-20 Brian G Agee Generation of signals with unpredictable transmission properties for wireless M2M networks
US9722828B2 (en) * 2015-09-23 2017-08-01 Qualcomm Incorporated Switch capacitor decision feedback equalizer with internal charge summation
WO2020050004A1 (ja) * 2018-09-03 2020-03-12 日本電気株式会社 伝送装置、伝送時間変動補償方法および伝送時間変動補償プログラムを格納した非一時的なコンピュータ可読媒体

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5218619A (en) * 1990-12-17 1993-06-08 Ericsson Ge Mobile Communications Holding, Inc. CDMA subtractive demodulation
GB2268371B (en) * 1992-04-10 1995-09-20 Roke Manor Research Radio communication systems
US5353300A (en) * 1993-06-07 1994-10-04 Motorola, Inc. Communication method for an adaptive direct sequence CDMA communication system
US5359624A (en) * 1993-06-07 1994-10-25 Motorola, Inc. System and method for chip timing synchronization in an adaptive direct sequence CDMA communication system
CN1035586C (zh) * 1993-10-13 1997-08-06 Ntt移动通信网株式会社 扩频通信接收机
US5422908A (en) * 1993-11-22 1995-06-06 Interdigital Technology Corp. Phased array spread spectrum system and method
JP2734952B2 (ja) * 1993-12-16 1998-04-02 日本電気株式会社 Ｃｄｍａ基地局受信装置
JP3202125B2 (ja) * 1994-03-10 2001-08-27 沖電気工業株式会社 符号分割多元接続システム
US5596600A (en) * 1995-04-06 1997-01-21 Mayflower Communications Company, Inc. Standalone canceller of narrow band interference for spread spectrum receivers

Also Published As

Publication number Publication date
HK1010952A1 (en) 1999-07-02
ZA966011B (en) 1997-01-31
EP0842568B1 (en) 2004-10-13
ATE279814T1 (de) 2004-10-15
DE69633625T2 (de) 2005-10-27
CN1091554C (zh) 2002-09-25
JP3241739B2 (ja) 2001-12-25
CN1192830A (zh) 1998-09-09
TW322667B (es) 1997-12-11
AU6715896A (en) 1997-02-26
DE69633625D1 (de) 2004-11-18
US5692006A (en) 1997-11-25
WO1997005709A1 (en) 1997-02-13
KR19990036012A (ko) 1999-05-25
MX9800853A (es) 1998-04-30
CA2228131A1 (en) 1997-02-13
JP2001352277A (ja) 2001-12-21
FI980162A (fi) 1998-03-30
FI980162A0 (fi) 1998-01-26
BR9609939A (pt) 1999-06-08
JPH11510343A (ja) 1999-09-07
EP0842568A1 (en) 1998-05-20

Similar Documents

Publication Publication Date Title
AR003021A1 (es) Un aparato para potenciar el rendimiento de receptores de senales de espectro extendido de secuencia directa y un metodo para desextender dichassenales mediante dicho espectro.
JP6503143B2 (ja) 直接検出型光通信システムの帯域内光干渉の軽減
Miguez et al. A linearly constrained constant modulus approach to blind adaptive multiuser interference suppression
DE602004020209D1 (de) Partialantwortempfänger
DE69431274D1 (de) Gerät zur Störungsunterdrückung, welches die nach Störungsunterdrückung und in symmetrischen Signalübertragungssystemen auftretende Verschlechterung der Signalhochfrequenzcharakteristik verhindern kann
KR970078065A (ko) Cdma 간섭 제거 장치
JP2014014111A (ja) 光通信システムにおけるサイクルスリップの影響を修正する方法、及びコヒーレント受信機
WO2008083096A1 (en) System and method for crosstalk cancellation
CO4600620A1 (es) Circuito supresor de ruido y metodo asociado para eliminar porciones de componentes de interferencia periodica de una senal de comunicacion
EP1946474A1 (en) Efficient data transmission and training of data processing functions
ATE116081T1 (de) Verfahren und einrichtung zur decodierung von wortgeschützten codewörtern durch einen nichtbinären bch-code gegen mindestens einen symbolfehler.
ES2112385T3 (es) Aparato de supresion de ruido.
JP3892911B2 (ja) デジタル信号を伝送する方法
JPH06188766A (ja) 回路装置
ATE314770T1 (de) Adaptive entzerrung und dekodierung für gespreizte kanalverzögerung
JP2022043231A (ja) 光通信システムにおける多経路干渉軽減のための回路
CN106797234B (zh) 噪声滤除系统、plc接收器及滤除电力线噪声的方法
EP0258702A3 (en) Method and apparatus for linear feedback sequence detection with error correction
US7593494B1 (en) System and method for canceling impulse noise
KR940002720A (ko) 데이타 수신기와, 데이타 송신기 및 데이타 수신기를 구비하는 전송 시스템
US10164684B2 (en) Interference detection and mitigation in power line communication
KR960006112Y1 (ko) 잡음제거회로
EP1441460A4 (en) IMPULSE NOISE SUPPRESSOR DEVICE
KR100506487B1 (ko) 단일 주파수, 다중 송신 통신망의 코드벡터 검출 장치
DE3478268D1 (en) Echo canceller with an adaptive digital filter for a transmission system