An Improved MMSE Channel Estimator for Joint Coded-Precoded OFDM

Guomei ZHANG  Shihua ZHU  Shaopeng WANG  Feng LI  

IEICE TRANSACTIONS on Communications   Vol.E92-B   No.7   pp.2520-2524
Publication Date: 2009/07/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.E92.B.2520
Print ISSN: 0916-8516
Type of Manuscript: LETTER
Category: Wireless Communication Technologies
precoded OFDM,  channel estimation,  iterative decoding,  MMSE estimation,  

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An improved iterative minimum mean-squared error (MMSE) channel estimation method is proposed for joint coding and precoding OFDM systems. Compared with the traditional simplified estimator, the proposed scheme provides higher estimation quality with slight complexity increment at low signal-to-noise ratio (SNR) values. The performance of the iterative receiver including the proposed estimator approaches that of the perfect MMSE estimator without any simplification.