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EM algorithm with sphere decoding for joint channel estimation and detection in MIMO systems

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3 Author(s)
Tajalli, H. ; Dept. of Electr. & Comput. Eng., Tehran Univ., Iran ; Hajiani, P. ; Shafiee, H.

In this paper, we introduce a novel method for joint channel estimation and symbol detection in a MIMO wireless communication system. The algorithm uses the expectation-maximization (EM) algorithm for channel estimation, together with a new complex-domain sphere decoding (SD) algorithm for near-optimal detection of data symbols. The proposed algorithm is tested on a MIMO communication system. Simulation results show that, even with a short training sequence, the algorithm provides a near optimal performance with a reasonable computational complexity. We also compare the computational complexity of the proposed sphere decoding approach with other techniques and show that it has a lower computational complexity without any performance penalty.

Published in:

Wireless and Optical Communications Networks, 2005. WOCN 2005. Second IFIP International Conference on

Date of Conference:

6-8 March 2005