Code-Aided Channel Tracking and Frequency Offset-Phase Noise Elimination for Multicarrier Systems

被引：21

作者：

Marey, Mohamed ^{[1
]}

Guenach, Mamoun ^{[2
]}

Steendam, Heidi ^{[1
]}

机构：

[1] Univ Ghent, Dept Telecommun & Informat Proc, B-9000 Ghent, Belgium

[2] Alcatel Lucent Bell Labs, Antwerp, Belgium

来源：

IEEE SIGNAL PROCESSING LETTERS | 2008年 / 15卷

关键词：

Carrier frequency offset; channel tracking; coding; expectation-maximization (EM) algorithm; orthogonal frequency-division multiplexing (OFDM); phase noise;

D O I：

10.1109/LSP.2008.2004517

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this contribution, we propose a novel code-aided channel tracking and carrier frequency offset (CFO) and/or phase noise (PN) estimation algorithm for orthogonal frequency-division multiplexing (OFDM) systems. Starting from the maximum-likelihood (NIL) principle, we derive a low complexity estimator based on the expectation-maximization (EM) algorithm. It turns out that the estimator receives soft information from the channel decoder to refine the CFO, PN, and channel estimates. Simulation results revealed that the proposed algorithm outperforms the conventional techniques in terms of bit-error rate (BER).

引用

页码：657 / 660

页数：4

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