LMMSE Channel Estimation with Soft Statistics for Turbo-MIMO Receivers

被引：4

作者：

Shin, Wooram ^{[1
]}

Lee, Seung Joon ^{[3
]}

Kwon, Dong-Seung ^{[1
]}

Kang, Joonhyuk ^{[2
]}

机构：

[1] Elect & Telecommun Res Inst, Taejon 305700, South Korea

[2] Korea Adv Inst Sci & Technol, Taejon 305732, South Korea

[3] Kangwon Natl Univ, Dept Elect & Elect Engn, Chunchon 200701, South Korea

来源：

IEEE COMMUNICATIONS LETTERS | 2009年 / 13卷 / 08期

关键词：

Turbo MIMO receiver; channel estimation; soft statistics; linear minimum mean squared error (LMMSE); maximum likelihood (ML); expectation maximization (EM); DETECTORS;

D O I：

10.1109/LCOMM.2009.090831

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Channel estimation techniques for turbo multiple-input multiple-output receivers are addressed, which exploit a priori information to refine the poor performance of initial channel estimates solely using training symbols. We study linear minimum mean squared error channel estimation (LMMSE-CE) using second-order soft statistics to incorporate the degree of decoding reliability. Utilizing this additional information effectively minimizes the error propagation which the maximum likelihood based expectation maximization channel estimation (ML-CE) suffers. The LMMSE-CE provides a smaller mean square error of channel estimation and block error rate than the ML-CE.

引用

页码：585 / 587

页数：3

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