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EM-based iterative receiver design with carrier-frequency offset estimation for MIMO OFDM systems

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3 Author(s)
Yong Sun ; Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA ; Zixiang Xiong ; Xiaodong Wang

In this letter, we study the design of expectation-maximization (EM)-based iterative receivers for multiple-input multiple-output (MIMO) orthogonal frequency-division multiplexing systems with the presence of carrier-frequency offset (CFO). Motivated by the spirit of maximum-likelihood estimation in the EM algorithm, we first present a pilot-aided CFO estimation scheme that allows fast Fourier transform-based fast implementation. Then this CFO estimation is incorporated into the initialization step of the iterative receiver. Experimental results show the effectiveness of our receiver design in combating CFO.

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Communications, IEEE Transactions on  (Volume:53 ,  Issue: 4 )