Iterative EM-based channel estimation for STBC-OFDM

Authors:
Ilhan Bastürk;Berna Özbek
Affiliations:
Electrical and Electronics Engineering Department, Izmir Institute of Technology Urla, Izmir, Turkey;Electrical and Electronics Engineering Department, Izmir Institute of Technology Urla, Izmir, Turkey
Venue:
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
Year:
2009

Citing 4
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Abstract

In this paper, an iterative EM based channel estimation algorithm is studied for STBC-OFDM systems. Compared to the time domain EM based channel estimation algorithm which needs matrix inversion, a frequency domain EM based channel estimation algorithm is proposed by estimating the channel coefficients for each subcarrier. The proposed channel estimation algorithm decreased the complexity without sacrificing the performance. The time domain and proposed frequency domain EM based channel estimation algorithms are compared in terms of bit error rate (BER), mean square error (MSE) and the number of iterations used in the EM algorithm.