Orthogonal Procrustes-Based Semi-Blind Channel Estimation for MIMO-OFDM Systems

被引：0
作者：
Hu Feng [1 ]
Li Jianping [1 ]
Yang Gang [1 ]
机构：
[1] Commun Univ China, Sch Informat Engn, Beijing, Peoples R China
来源：
2ND IEEE INTERNATIONAL CONFERENCE ON ADVANCED COMPUTER CONTROL (ICACC 2010), VOL. 4 | 2010年
关键词：
semi-blind channel estimation; MIMO-OFDM; OP; EVD;
D O I：
10.1109/ICACC.2010.5486967
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
This paper introduces a novel semi-blind channel estimation algorithm based on Orthogonal Procrustes (OP) approach for Multiple Input Multiple Output (MIMO) systems using Orthogonal Frequency Division Multiplexing (OFDM) modulation. The presented joint estimator is based on decomposition of channel matrix H as a whitening matrix R and a unitary rotation matrix Q. The whitening matrix R can be estimated blindly based on the eigenvalue decomposition (EVD) of the received signal correlation matrix, while Q has to be fed by using the properties of the constrained OP estimator for an orthogonal pilot sequence. The estimation gain is obtained by the power method with low complexity as it offers such optimum rotation matrices which are parameterized a fewer number of parameters. Various numerical examples are conducted to support the algorithms and analysis, and they demonstrate improved performance up to 3-5 dB compared to exclusively training-based estimation.
引用
收藏
页码：226 / 230
页数：5
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