NO20072746L - Pilotrettede og pilot/datarettede utlignere - Google Patents

Pilotrettede og pilot/datarettede utlignere

Info

Publication number
NO20072746L
NO20072746L NO20072746A NO20072746A NO20072746L NO 20072746 L NO20072746 L NO 20072746L NO 20072746 A NO20072746 A NO 20072746A NO 20072746 A NO20072746 A NO 20072746A NO 20072746 L NO20072746 L NO 20072746L
Authority
NO
Norway
Prior art keywords
pilot
oriented
equalizer
equalizer filters
equalizers
Prior art date
Application number
NO20072746A
Other languages
English (en)
Inventor
Philip J Pietraski
Kyle Jung-Lin Pan
Mihaela C Beluri
Original Assignee
Interdigital Tech Corp
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 Interdigital Tech Corp filed Critical Interdigital Tech Corp
Publication of NO20072746L publication Critical patent/NO20072746L/no

Links

Classifications

    • 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
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H7/00—Multiple-port networks comprising only passive electrical elements as network components
    • H03H7/30—Time-delay networks
    • 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
    • H04L25/03044—Arrangements for removing intersymbol interference operating in the time domain adaptive, i.e. capable of adjustment during data reception with a non-recursive structure using fractionally spaced delay lines or combinations of fractionally integrally spaced taps
    • 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
    • H04B1/712—Weighting of fingers for combining, e.g. amplitude control or phase rotation using an inner loop
    • 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
    • H04B2201/70701—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation featuring pilot assisted reception
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Radio Transmission System (AREA)

Abstract

Det er beskrevet en normalisert minste middels kvadrat (NLMS) utligner som innbefatter to utlignerfiltre. I én utførelsesform blir en enkelt korrigeringsuttrykkgenerator anvendt til å generere korrigeringsuttrykk for tappingskoeffisientoppdateringer av hvert av utlignerfiltrene, basert på et pilotsignal. I en annen utførelsesform blir to forskjellige korrigeringsuttrykkgeneratorer anvendt til å generere korrigeringsuttrykk for hvert av utlignerfiltrene, hvorved én av korrigeringsuttrykksgeneratorene anvender data mottatt fra en hardbeslutningsenhet ved utgangen på ett av utlignerfiltrene for å generere korrigeringsuttrykk for begge av utlignerfiltrene.
NO20072746A 2004-11-05 2007-05-30 Pilotrettede og pilot/datarettede utlignere NO20072746L (no)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US62563004P 2004-11-05 2004-11-05
US11/256,047 US7532667B2 (en) 2004-11-05 2005-10-21 Pilot-directed and pilot/data-directed equalizers
PCT/US2005/039547 WO2006052564A2 (en) 2004-11-05 2005-11-01 Pilot-directed and pilot/data-directed equalizers

Publications (1)

Publication Number Publication Date
NO20072746L true NO20072746L (no) 2007-08-06

Family

ID=36316298

Family Applications (1)

Application Number Title Priority Date Filing Date
NO20072746A NO20072746L (no) 2004-11-05 2007-05-30 Pilotrettede og pilot/datarettede utlignere

Country Status (9)

Country Link
US (2) US7532667B2 (no)
EP (1) EP1813016A4 (no)
JP (1) JP4477673B2 (no)
KR (2) KR100875226B1 (no)
CA (1) CA2586199A1 (no)
MX (1) MX2007005344A (no)
NO (1) NO20072746L (no)
TW (3) TWI305985B (no)
WO (1) WO2006052564A2 (no)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
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US8290024B2 (en) * 2004-08-12 2012-10-16 Texas Instruments Incorporated Methods and apparatus to facilitate improved code division multiple access receivers
EP1924004B1 (en) * 2005-09-06 2015-04-08 Fujitsu Ltd. Equalizer device and method
KR100693555B1 (ko) * 2005-12-09 2007-03-14 주식회사 팬택 수신 성능을 개선한 디지털 멀티미디어 방송 수신장치 및이의 채널추정방법
US8009728B2 (en) * 2005-12-09 2011-08-30 Electronics And Telecommunications Research Institute Parallel equalizer for DS-CDMA UWB system and method thereof
KR101133839B1 (ko) * 2006-02-13 2012-04-06 에스티 에릭슨 에스에이 필터 가중 추정 디바이스, 등화기, 통신 수신기 및 통신 장비
US8755426B1 (en) * 2012-03-15 2014-06-17 Kandou Labs, S.A. Rank-order equalization
US20140269362A1 (en) * 2013-03-15 2014-09-18 Shahrnaz Azizi Techniques to Update a Wireless Communication Channel Estimation
US9385778B2 (en) 2014-01-31 2016-07-05 Qualcomm Incorporated Low-power circuit and implementation for despreading on a configurable processor datapath
CN115296696B (zh) * 2022-06-29 2023-12-12 西安空间无线电技术研究所 一种适用于卫星测控突发扩频信号的捕获方法及装置

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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
EP0744101B1 (en) * 1994-02-10 1998-08-05 International Business Machines Corporation Method and apparatus for multiuser-interference reduction
US5666378A (en) * 1994-03-18 1997-09-09 Glenayre Electronics, Inc. High performance modem using pilot symbols for equalization and frame synchronization
TW465234B (en) * 1997-02-18 2001-11-21 Discovision Ass Single chip VLSI implementation of a digital receiver employing orthogonal frequency division multiplexing
KR100309748B1 (ko) * 1997-12-26 2001-12-17 윤종용 상향파일럿신호를이용한케이블에취에프씨망을위한양방향간선증폭기및에취에프씨망의케이블모뎀
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
US6215354B1 (en) * 1998-03-06 2001-04-10 Fujant, Inc. Closed loop calibration for an amplitude reconstruction amplifier
GB2346520A (en) 1998-11-09 2000-08-09 Wi Lan Inc Data recovery in an OFDM system exploiting pilot subcarriers
US6658047B1 (en) * 1999-03-10 2003-12-02 Nokia Corporation Adaptive channel equalizer
US6628781B1 (en) * 1999-06-03 2003-09-30 Telefonaktiebolaget Lm Ericsson (Publ) Methods and apparatus for improved sub-band adaptive filtering in echo cancellation systems
TW466474B (en) * 1999-08-06 2001-12-01 Fujitsu Ltd Semiconductor device with decision feedback equalizer
FR2805943B1 (fr) * 1999-09-14 2002-08-09 Inst Nat Sciences Appliq Procede d'egalisation dans des recepteurs utilisant une combinaison des techniques de modulations a porteuses multiples et a acces multiple par repartition de codes
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TWI220350B (en) 2001-04-27 2004-08-11 Macronix Int Co Ltd Equalizer with automatic correction and self-test
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JP4457657B2 (ja) * 2003-12-10 2010-04-28 日本電気株式会社 等化器
MX2007005453A (es) * 2004-11-05 2007-05-21 Interdigital Tech Corp Igualador adaptable con un generador de mascara de derivaciones activas de doble modo y una unidad de control de amplitud de senal de referencia piloto.
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US8018986B2 (en) * 2005-10-03 2011-09-13 Nec Corporation Signal receiving apparatus including equalizer, terminal apparatus, signal receiving method, and signal receiving program

Also Published As

Publication number Publication date
US7532667B2 (en) 2009-05-12
TWI373238B (en) 2012-09-21
TWI305985B (en) 2009-02-01
CA2586199A1 (en) 2006-05-18
KR100875226B1 (ko) 2008-12-19
US8213493B2 (en) 2012-07-03
KR20070097129A (ko) 2007-10-02
TW200711396A (en) 2007-03-16
WO2006052564A3 (en) 2006-11-16
TWI418185B (zh) 2013-12-01
JP2008519569A (ja) 2008-06-05
EP1813016A4 (en) 2013-01-16
TW200625888A (en) 2006-07-16
KR20070073968A (ko) 2007-07-10
TW200943848A (en) 2009-10-16
EP1813016A2 (en) 2007-08-01
JP4477673B2 (ja) 2010-06-09
US20090180528A1 (en) 2009-07-16
MX2007005344A (es) 2007-06-11
WO2006052564A2 (en) 2006-05-18
US20060098726A1 (en) 2006-05-11

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