MX2009010352A - Estimador de canal para sistemas de multiplexion por division de frecuencia ortogonal (ofdm). - Google Patents

Estimador de canal para sistemas de multiplexion por division de frecuencia ortogonal (ofdm).

Info

Publication number
MX2009010352A
MX2009010352A MX2009010352A MX2009010352A MX2009010352A MX 2009010352 A MX2009010352 A MX 2009010352A MX 2009010352 A MX2009010352 A MX 2009010352A MX 2009010352 A MX2009010352 A MX 2009010352A MX 2009010352 A MX2009010352 A MX 2009010352A
Authority
MX
Mexico
Prior art keywords
received signal
estimation
subcarriers
noise
estimators
Prior art date
Application number
MX2009010352A
Other languages
English (en)
Inventor
Xiangyang Zhuang
Krishna Kamal Sayana
Bryan S Nollett
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of MX2009010352A publication Critical patent/MX2009010352A/es

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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/022—Channel estimation of frequency response
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • 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
    • H04L25/0202—Channel estimation
    • H04L25/024—Channel estimation channel estimation algorithms
    • H04L25/025—Channel estimation channel estimation algorithms using least-mean-square [LMS] method
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes

Abstract

Un receptor con estimación de canal basada en DFT que tiene buena supresión de ruido para relaciones de señal a ruido tanto altas como bajas que proporciona ventajas sobre los estimadores de DFT convencionales y los estimadores de Error Cuadrático Medio Mínimo (MMSE). El uso de MMSE puede ser incorporado para la estimación en los bordes de la banda proporcionando mayores mejoras. La señal recibida en el dominio del tiempo, es transformada a la señal recibida en el dominio de la frecuencia vía una FFT de N puntos (501). La señal recibida en el dominio de la frecuencia en los lugares piloto es entonces usada para obtener estimaciones de canal "ruidoso" en los subportadores piloto dividiendo los símbolos pilotos conocidos en (503). Los pilotos uniformemente separados son asumidos sobre una ven1ana de subportadores útiles. El relleno es aplicado a las estimaciones de canal iniciales a ambos lados de la banda para considerar subportadores no usados como separación de protección. Los factores de ponderación durante la estimación de potencia pueden tomar en cuenta varias características de ruido como combinaciones de características de potencia de ruido conocidas y limitadas por el tiempo.
MX2009010352A 2007-03-27 2008-01-21 Estimador de canal para sistemas de multiplexion por division de frecuencia ortogonal (ofdm). MX2009010352A (es)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/691,494 US8406319B2 (en) 2007-03-27 2007-03-27 Channel estimator with high noise suppression and low interpolation error for OFDM systems
PCT/US2008/051571 WO2008118514A2 (en) 2007-03-27 2008-01-21 Channel estimator for ofdm systems

Publications (1)

Publication Number Publication Date
MX2009010352A true MX2009010352A (es) 2009-12-08

Family

ID=39684156

Family Applications (1)

Application Number Title Priority Date Filing Date
MX2009010352A MX2009010352A (es) 2007-03-27 2008-01-21 Estimador de canal para sistemas de multiplexion por division de frecuencia ortogonal (ofdm).

Country Status (8)

Country Link
US (1) US8406319B2 (es)
EP (1) EP2135410B1 (es)
JP (1) JP5201421B2 (es)
KR (1) KR101059276B1 (es)
CN (1) CN101682588B (es)
BR (1) BRPI0809425A8 (es)
MX (1) MX2009010352A (es)
WO (1) WO2008118514A2 (es)

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CN103117966B (zh) * 2013-03-12 2015-07-08 中国空间技术研究院 一种基于动态导频调整的信道估计方法
CN103312771B (zh) * 2013-04-26 2016-04-06 北京创毅讯联科技股份有限公司 专网通信数据处理方法与装置
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Also Published As

Publication number Publication date
US20120195397A1 (en) 2012-08-02
CN101682588A (zh) 2010-03-24
EP2135410B1 (en) 2016-01-13
BRPI0809425A8 (pt) 2017-01-31
BRPI0809425A2 (pt) 2014-09-09
KR101059276B1 (ko) 2011-08-24
CN101682588B (zh) 2013-09-04
JP2010532592A (ja) 2010-10-07
US8406319B2 (en) 2013-03-26
WO2008118514A3 (en) 2008-11-13
JP5201421B2 (ja) 2013-06-05
EP2135410A2 (en) 2009-12-23
WO2008118514A2 (en) 2008-10-02
KR20090115229A (ko) 2009-11-04

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