[go: up one dir, main page]
More Web Proxy on the site http://driver.im/

ES2178296T3 - Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma. - Google Patents

Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma.

Info

Publication number
ES2178296T3
ES2178296T3 ES98963478T ES98963478T ES2178296T3 ES 2178296 T3 ES2178296 T3 ES 2178296T3 ES 98963478 T ES98963478 T ES 98963478T ES 98963478 T ES98963478 T ES 98963478T ES 2178296 T3 ES2178296 T3 ES 2178296T3
Authority
ES
Spain
Prior art keywords
impulse response
received signals
channel
channel impulse
noise
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Lifetime
Application number
ES98963478T
Other languages
English (en)
Inventor
Olli Piirainen
Aki Happonen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nokia Oyj
Original Assignee
Nokia Oyj
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 Nokia Oyj filed Critical Nokia Oyj
Application granted granted Critical
Publication of ES2178296T3 publication Critical patent/ES2178296T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0224Channel estimation using sounding signals
    • H04L25/0228Channel estimation using sounding signals with direct estimation from sounding signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/0212Channel estimation of impulse response
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202Channel estimation
    • H04L25/024Channel estimation channel estimation algorithms
    • H04L25/0242Channel estimation channel estimation algorithms using matrix methods

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Time-Division Multiplex Systems (AREA)

Abstract

Un método para procesar señales recibidas que han sido transmitidas a través de un canal de transmisión, en el que: dichas señales recibidas (y) son sometidas a una estimación de una función (h) de respuesta de impulso de control de dicho canal de transmisión (1), estando basada dicha estimación en un procesado de Error Cuadrático Medio Mínimo Lineal-LMMSE- usando una secuencia de entrenamiento (TR SEQ) transmitida junto con las muestras recibidas contenidas en dichas señales recibidas (y), caracterizado porque dicha estimación está además basada en una estimación del ruido y la energía de interferencia representada por una varianza de ruido e interferencia (S2) así como una estimación de la distribución de la energía de respuesta de impulso representada por una matriz de covarianza de parámetros estimados (Chh) para dicho canal (1), en que dicha estimación de dicha función (h) de respuesta de impulso de control está basada en una estimación de LMMSE simplificada de acuerdo con la ecuación**(Fórmula)** en donde h designa la función de respuesta de impulso de control en representación de vector, Delta 2 designa el valor de la varianza del ruido del modelo lineal de punto de partida, Chh es la matriz de covarianza de parámetros estimados, X es la matriz de secuencia de símbolos que contiene la información relativa a una secuencia de entrenamiento usada (TR SEQ), y designa la señal recibida en representación de vector, y el operador ¿-1¿ designa una matriz inversa respectiva, tal que para una matriz M se satisface la relación de M*M-1, = E, representando E la matriz unidad, y el operador ¿H¿ designa la trasposición conjugada compleja de la matriz y/o el vector respectivo.
ES98963478T 1998-11-18 1998-11-18 Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma. Expired - Lifetime ES2178296T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP1998/007393 WO2000030275A1 (en) 1998-11-18 1998-11-18 A method for improved channel impulse response estimation in tdma systems

Publications (1)

Publication Number Publication Date
ES2178296T3 true ES2178296T3 (es) 2002-12-16

Family

ID=8167134

Family Applications (1)

Application Number Title Priority Date Filing Date
ES98963478T Expired - Lifetime ES2178296T3 (es) 1998-11-18 1998-11-18 Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma.

Country Status (7)

Country Link
US (1) US6631160B2 (es)
EP (1) EP1147624B1 (es)
AT (1) ATE223122T1 (es)
AU (1) AU1873899A (es)
DE (1) DE69807535T2 (es)
ES (1) ES2178296T3 (es)
WO (1) WO2000030275A1 (es)

Families Citing this family (32)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1147623B1 (en) * 1998-11-18 2003-07-02 Nokia Corporation A method for modifying the channel impulse response in tdma systems
JP2003500897A (ja) * 1999-05-17 2003-01-07 ノキア コーポレイション Tdmaシステムにおけるノイズエネルギー推定方法
EP1197027A1 (en) 1999-07-27 2002-04-17 Nokia Corporation A method for noise energy estimation
US7079601B2 (en) * 2001-06-19 2006-07-18 Telefonaktiebolaget Lm Ericsson (Publ) Efficient channel estimation in a digital communications system
US6816470B2 (en) * 2001-09-18 2004-11-09 Interdigital Technology Corporation Method and apparatus for interference signal code power and noise variance estimation
GB0124321D0 (en) * 2001-10-10 2001-11-28 Nokia Corp Modulation determination
US7190665B2 (en) * 2002-04-19 2007-03-13 Texas Instruments Incorporated Blind crosstalk cancellation for multicarrier modulation
US7239679B2 (en) * 2002-05-29 2007-07-03 Zenith Electronics Corporation Adaptive thresholding algorithm for the noise due to unknown symbols in correlation based channel impulse response (CIR) estimate
EP1379040A1 (en) * 2002-07-03 2004-01-07 Motorola, Inc. Arrangement and method for iterative channel impulse response estimation
GB2395623B (en) * 2002-11-19 2006-02-22 Matsushita Electric Ind Co Ltd Reduced complexity dynamic tap search channel estimator
WO2004064298A2 (en) * 2003-01-10 2004-07-29 Interdigital Technology Corporation Generalized two-stage data estimation
US7203257B2 (en) * 2003-05-23 2007-04-10 Zenith Electronics Corporation Best linear unbiased channel estimation for frequency selective multipath channels with long delay spreads
US8149960B2 (en) * 2003-05-23 2012-04-03 Zenith Electronics Llc Channel estimation for frequency selective multipath channels with long delay spreads based on an assumed physical channel
US20050031018A1 (en) * 2003-06-27 2005-02-10 Nokia Corporation Zero-padded OFDM with improved performance over multipath channels
US20050063298A1 (en) * 2003-09-02 2005-03-24 Qualcomm Incorporated Synchronization in a broadcast OFDM system using time division multiplexed pilots
KR20050040615A (ko) * 2003-10-29 2005-05-03 삼성전자주식회사 훈련열 데이터를 이용하여 채널을 추정하는 디지털수신기를 위한 채널 추정 장치 및 그 방법
US8433005B2 (en) * 2004-01-28 2013-04-30 Qualcomm Incorporated Frame synchronization and initial symbol timing acquisition system and method
US20050163263A1 (en) * 2004-01-28 2005-07-28 Gupta Alok K. Systems and methods for frequency acquisition in a wireless communication network
US8724447B2 (en) * 2004-01-28 2014-05-13 Qualcomm Incorporated Timing estimation in an OFDM receiver
US20090190675A1 (en) * 2004-08-31 2009-07-30 Qualcomm Incorporated Synchronization in a broadcast ofdm system using time division multiplexed pilots
FI20055368A0 (fi) * 2005-06-30 2005-06-30 Nokia Corp Vastaanotin ja menetelmä vastaanotetun datan käsittelemiseksi
US8345733B2 (en) * 2005-09-13 2013-01-01 At&T Intellectual Property I, Lp Method and apparatus for equalizing signals
WO2009003129A2 (en) * 2007-06-27 2008-12-31 Rambus Inc. Methods and circuits for adaptive equalization and channel characterization using live data
FI20085457A0 (fi) * 2008-05-15 2008-05-15 Nokia Corp Laite, menetelmä ja tietokoneohjelma demodulaatiota varten
JP4561880B2 (ja) * 2008-06-11 2010-10-13 ソニー株式会社 通信装置、通信方法およびコンピュータプログラム
KR101152808B1 (ko) * 2010-03-16 2012-06-12 서강대학교산학협력단 잡음 분산 추정 방법 및 이를 이용하는 수신기
US8509330B2 (en) * 2010-09-30 2013-08-13 Mitsubishi Electric Research Laboratories, Inc. Method for estimating time-varying and frequency-selective channels
KR20120047449A (ko) * 2010-11-04 2012-05-14 삼성전자주식회사 가중치를 고려하는 피아이씨 채널 추정기를 위한 방법 및 장치
JP2013046131A (ja) * 2011-08-23 2013-03-04 Mitsubishi Electric Research Laboratories Inc 時間変化的および周波数選択的なチャネルを推定するための方法
US9007942B2 (en) * 2012-08-02 2015-04-14 Qualcomm Incorporated Iterative covariance inversion based on linear receiver designs
RU2544178C1 (ru) * 2013-10-11 2015-03-10 Открытое акционерное общество "Камчатский гидрофизический институт" (ОАО "КГФИ") Устройство для приема дискретных сигналов, прошедших многолучевой канал связи
CN114866167B (zh) * 2022-04-18 2024-08-06 哲库科技(北京)有限公司 信道参数估计方法、装置、设备、存储介质及程序产品

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251233A (en) 1990-12-20 1993-10-05 Motorola, Inc. Apparatus and method for equalizing a corrupted signal in a receiver
US5214675A (en) * 1991-07-02 1993-05-25 Motorola, Inc. System and method for calculating channel gain and noise variance of a communication channel
FI98018C (fi) 1994-08-18 1997-03-25 Nokia Mobile Phones Ltd Menetelmä ja laite radiokanavan impulssivasteen mittaamiseksi
FI103539B (fi) * 1996-07-03 1999-07-15 Nokia Telecommunications Oy Menetelmä samankanavasignaalien voimakkuuden määrittämiseksi ja vastaa notin
EP1099328B1 (en) 1998-07-21 2004-06-30 Nokia Corporation Channel impulse response estimation using received signal variance
US6373888B1 (en) * 1998-10-09 2002-04-16 Telefonaktiebolaget Lm Ericsson (Publ) Estimated channel with variable number of taps

Also Published As

Publication number Publication date
DE69807535T2 (de) 2003-04-24
DE69807535D1 (de) 2002-10-02
US6631160B2 (en) 2003-10-07
EP1147624A1 (en) 2001-10-24
EP1147624B1 (en) 2002-08-28
WO2000030275A1 (en) 2000-05-25
ATE223122T1 (de) 2002-09-15
AU1873899A (en) 2000-06-05
US20020024994A1 (en) 2002-02-28

Similar Documents

Publication Publication Date Title
ES2178296T3 (es) Un metodo para la estimacion mejorada de la respuesta de impulso de canal en sistemas tdma.
WO2005050896A3 (en) Method and system for antenna interference cancellation
HUP0001298A2 (hu) Eljárás és berendezés csatornabecsléshez OFDM-elvű továbbító rendszerben
EP0804007A3 (en) Adaptive equalizer with step size proportional to the estimated delay between received signals
TW365717B (en) Receiver apparatus, and associated method, for receiving a receive signal transmitted upon a channel susceptible to interference
FI944736A0 (fi) Signaalin ilmaisumenetelmä TDMA-matkaviestinjärjesSignaalin ilmaisumenetelmä TDMA-matkaviestinjärjestelmän vastaanottimessa sekä menetelmän toteuttavatelmän vastaanottimessa sekä menetelmän toteuttava vastaanotin vastaanotin
EP1708401A3 (de) Übertragungsverfahren mit senderseitiger Frequenz- und Zeitspreizung
ATE463749T1 (de) Verfahren zur einfallsrichtungsschätzung
CA2290570A1 (en) Device and method for transmitting common channel message in cdma communication system
MX9203905A (es) Sistema y metodo para calcular la ganancia de canal y la variacion de ruido de un canal de comunicacion.
EP0711044A3 (en) Channel estimation in a CDMA receiver using multiple access interference cancellation
TW200501572A (en) Communication receiver with an adaptive equalizer length
AU2842301A (en) Method and apparatus for estimating a frequency offset by combining pilot symbols and data symbols
BR0116620A (pt) Método de estimar a potência de interferência em um receptor de um sistema de comunicação, receptor de um sistema de comunicação, e, sistema w-cdma
NO994743D0 (no) FremgangsmÕte for transmisjon, samt radiosystem
NO20002220D0 (no) FremgangsmÕte for overføring, samt radiosystem
WO2005062920A3 (en) System and method for mitigating noise associated with information communication
CA2411457A1 (en) Transmission system, transmission method, transmission apparatus, and electronic recording medium having recorded therein transmission program
AU2001246607A1 (en) Method for estimating a correlation matrix of interfering signals received through a sensor array
TW428397B (en) Data transmission apparatus and data transmission system
ATE270482T1 (de) Schätzung der kanalimpulsantwort mittels der streuung vom empfangenen signal
WO1997013378A3 (en) Apparatus and method for determining and using channel state information
AU1339499A (en) A method for modifying the channel impulse response in tdma systems
NO20011184L (no) Fremgangsmåte for overföring, samt radiosystem
MY122284A (en) Method and apparatus for transforming a channel estimate