Blind Channel Estimation by EM Algorithm for OFDM Systems

被引：0
|
作者：
Abe, Hirokazu [1 ]
Fujii, Masahiro [1 ]
Iwamatsu, Takanori [2 ]
Hatano, Hiroyuki [1 ]
Ito, Atsushi [1 ]
Watanabe, Yu [1 ]
机构：
[1] Utsunomiya Univ, Grad Sch Engn, Dept Informat Syst Sci, Utsunomiya, Tochigi 3218585, Japan
[2] Fujitsu Telecom Networks Ltd, Oyama 3238511, Japan
来源：
IEICE TRANSACTIONS ON FUNDAMENTALS OF ELECTRONICS COMMUNICATIONS AND COMPUTER SCIENCES | 2017年 / E100A卷 / 01期
关键词：
blind channel estimation; OFDM; EM algorithm; channel frequency response correlation; fixed wireless communication systems; SUBSPACE; IDENTIFICATION; TIME;
D O I：
10.1587/transfun.E100.A.210
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
It is necessary to estimate channel state information coherently to equalize the received signal in wireless communication systems. The pilot symbol, known at the receiver, aided channel estimator degrades the transmission efficiency because it requires the signal spaces and the energy for the transmission. In this paper, we assume a fixed wireless communication system in line of sight slowly varying channel and propose a new blind channel estimation method without help from the pilot symbol for Orthogonal Frequency Division Multiplexing systems. The proposed estimator makes use of the Expectation -Maximization algorithm and the correlation property among the channel frequency responses by considering the assumed channel environment. By computer simulations, we show that the proposed estimator can asymptotically achieve bit error rate performance by using the ideal channel estimation.
引用
收藏
页码：210 / 218
页数：9
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