BR9904276A - Rastreio de um canal em um receptor móvel - Google Patents

Rastreio de um canal em um receptor móvel

Info

Publication number
BR9904276A
BR9904276A BR9904276-2A BR9904276A BR9904276A BR 9904276 A BR9904276 A BR 9904276A BR 9904276 A BR9904276 A BR 9904276A BR 9904276 A BR9904276 A BR 9904276A
Authority
BR
Brazil
Prior art keywords
algorithm
receiver
frequency deviation
frequency
estimate
Prior art date
Application number
BR9904276-2A
Other languages
English (en)
Inventor
Markus Rupp
Original Assignee
Lucent Technologies 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 Lucent Technologies Inc filed Critical Lucent Technologies Inc
Publication of BR9904276A publication Critical patent/BR9904276A/pt

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/005—Control of transmission; Equalising
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
    • H04L27/22—Demodulator circuits; Receiver circuits
    • H04L27/233—Demodulator circuits; Receiver circuits using non-coherent demodulation
    • H04L27/2332—Demodulator circuits; Receiver circuits using non-coherent demodulation using a non-coherent carrier
    • 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)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Error Detection And Correction (AREA)
  • Circuits Of Receivers In General (AREA)
  • Channel Selection Circuits, Automatic Tuning Circuits (AREA)

Abstract

<B>RASTREIO DE UM CANAL EM UM RECEPTOR MóVEL<D> Um receptor eficaz é obtido para situações onde o receptor é móvel, e pode estar se deslocando em velocidade relativamente elevada, e onde o oscilador de desmodulação interna do receptor causa um desvio de freq³ência, com processamento que partilha um algoritmo comum tanto para estimativa de características de canal como de desvio de freq³ência. Especificamente, o algoritmo comumente empregado, tal como o algoritmo LMS, computa uma estimativa do desvio de freq³ência, e aquele mesmo algoritmo é também usado para estimar as características de canal. Quando o algoritmo LMS é usado, uma estimativa de desvio de freq³ência pode ser derivada dos sinais derivados no curso da execução do algoritmo LMS. Um fator de compensação de freq³ência é então desenvolvido e aplicado ao sinal que chega para criar um sinal que não tem um desvio de freq³ência considerado. Esse sinal é então aplicado a um processo que também emprega o algoritmo LMS, em combinação com um algoritmo de detecção, tal como, por exemplo, o algoritmo Viterbi, para recuperar a partir do sinal que chega os sinais de informação que foram codificados em sinais que chegam.
BR9904276-2A 1998-02-27 1999-02-23 Rastreio de um canal em um receptor móvel BR9904276A (pt)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US09/032,425 US6208617B1 (en) 1998-02-27 1998-02-27 Channel tracking in a mobile receiver

Publications (1)

Publication Number Publication Date
BR9904276A true BR9904276A (pt) 2000-10-24

Family

ID=21864901

Family Applications (1)

Application Number Title Priority Date Filing Date
BR9904276-2A BR9904276A (pt) 1998-02-27 1999-02-23 Rastreio de um canal em um receptor móvel

Country Status (8)

Country Link
US (1) US6208617B1 (pt)
EP (1) EP0939502B1 (pt)
JP (1) JP3581266B2 (pt)
KR (1) KR100350341B1 (pt)
CN (1) CN1232334A (pt)
AU (1) AU1836399A (pt)
BR (1) BR9904276A (pt)
CA (1) CA2260528A1 (pt)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6542560B1 (en) * 1999-04-23 2003-04-01 Lucent Technologies Inc. Method of channel estimation and compensation based thereon
US6757547B1 (en) * 2000-05-05 2004-06-29 Lucent Technologies Inc. Methods and devices for improving the performance of wireless devices using speed and noise metrics
KR100436207B1 (ko) * 2002-06-18 2004-06-12 전자부품연구원 채널 추정 및 디씨 옵셋 보상 방식을 이용한 홈알에프시스템
DE102004026072B4 (de) * 2004-05-25 2007-02-15 Micronas Gmbh Verfahren und Vorrichtung zur bewegungskompensierten Rauschschätzung bei mobilen drahtlosen Übertragungssystemen
US7474724B1 (en) 2004-10-13 2009-01-06 Cirrus Logic, Inc. Method and system for video-synchronous audio clock generation from an asynchronously sampled video signal
KR100871210B1 (ko) 2006-06-08 2008-12-01 삼성전자주식회사 직교 주파수 분할 다중화 시스템에서 심벌 타이밍 조절이후 채널추정 및 보정에 관한 방법 및 장치
US8300736B2 (en) * 2009-10-19 2012-10-30 Issc Technologies Corp. Method and apparatus for phase reference tracking of digital phase modulated signals in the receiver
CN105991485B (zh) * 2015-01-30 2019-03-22 富士通株式会社 信道间隔估计装置、波长监测装置以及接收机
CN105158335B (zh) * 2015-08-21 2018-03-23 南昌航空大学 一种钢‑玻璃钢复合板材脱粘超声导波评价方法

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4523311A (en) * 1983-04-11 1985-06-11 At&T Bell Laboratories Simultaneous transmission of speech and data over an analog channel
SE465245B (sv) * 1989-12-22 1991-08-12 Ericsson Telefon Ab L M Foerfarande att utfoera kanalestimering foer en faedande kanal vid oeverfoering av symbolsekvenser
US5233632A (en) * 1991-05-10 1993-08-03 Motorola, Inc. Communication system receiver apparatus and method for fast carrier acquisition
US5303263A (en) * 1991-06-25 1994-04-12 Oki Electric Industry Co., Ltd. Transmission channel characteristic equalizer
US5263026A (en) * 1991-06-27 1993-11-16 Hughes Aircraft Company Maximum likelihood sequence estimation based equalization within a mobile digital cellular receiver
JP3100447B2 (ja) * 1992-01-10 2000-10-16 三菱電機株式会社 適応等化器および受信機
US5602881A (en) * 1992-04-24 1997-02-11 Oki Electric Industry Co., Ltd. Receiver for a digital communication system
US5313495A (en) * 1992-05-12 1994-05-17 Hughes Aircraft Company Demodulator for symbols transmitted over a cellular channel
US5255290A (en) * 1992-08-21 1993-10-19 Teknekron Communications System, Inc. Method and apparatus for combined frequency offset and timing offset estimation
US5343498A (en) * 1993-03-08 1994-08-30 General Electric Company Sample timing selection and frequency offset correction for U.S. digital cellular mobile receivers
EP0684708B1 (en) * 1993-12-15 2005-10-26 Ntt Mobile Communications Network Inc. Adaptive equalizer
US5619524A (en) * 1994-10-04 1997-04-08 Motorola, Inc. Method and apparatus for coherent communication reception in a spread-spectrum communication system
US5684836A (en) * 1994-12-22 1997-11-04 Mitsubishi Denki Kabushiki Kaisha Receiver with automatic frequency control
EP0959568A4 (en) * 1997-03-04 2007-09-26 Mitsubishi Electric Corp RECEIVER WITH FREQUENCY TRANSITION CORRECTION FUNCTION

Also Published As

Publication number Publication date
KR100350341B1 (ko) 2002-08-28
JP3581266B2 (ja) 2004-10-27
US6208617B1 (en) 2001-03-27
KR19990072888A (ko) 1999-09-27
EP0939502B1 (en) 2011-06-08
JP2000036779A (ja) 2000-02-02
CA2260528A1 (en) 1999-08-26
EP0939502A2 (en) 1999-09-01
AU1836399A (en) 1999-09-09
EP0939502A3 (en) 2003-05-28
CN1232334A (zh) 1999-10-20

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Legal Events

Date Code Title Description
FA10 Dismissal: dismissal - article 33 of industrial property law
B11Y Definitive dismissal acc. article 33 of ipl - extension of time limit for request of examination expired
B15K Others concerning applications: alteration of classification

Ipc: H04L 25/03 (2006.01), H04L 27/233 (2006.0