Improved SISO MMSE Detection for Joint Coded-Precoded OFDM under Imperfect Channel Estimation

Guomei ZHANG; Shihua ZHU; Feng LI; Pinyi REN

doi:10.1587/transcom.E93.B.757

Regular Section

Improved SISO MMSE Detection for Joint Coded-Precoded OFDM under Imperfect Channel Estimation

Guomei ZHANG, Shihua ZHU, Feng LI, Pinyi REN

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Keywords: precoded OFDM, iterative decoding, soft-input soft-output detection, channel estimation error

JOURNAL RESTRICTED ACCESS

2010 Volume E93.B Issue 3 Pages 757-761

DOI https://doi.org/10.1587/transcom.E93.B.757

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Abstract

An improved soft-input soft-output (SISO) minimum mean-squared error (MMSE) detection method is proposed for joint coding and precoding OFDM systems under imperfect channel estimation. Compared with the traditional mismatched detection which uses the channel estimate as its exact value, the signal model of the proposed detector is more accurate and the influence of channel estimation error (CEE) can be effectively mitigated. Simulations indicate that the proposed scheme can improve the bit error rate (BER) performance with fewer pilot symbols.

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