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

Author

Sun, Yong ; Xiong, Zixiang ; Wang, Xiaodong

Author_Institution

Dept. of Electr. Eng., Texas A&M Univ., College Station, TX, USA

Volume

53

Issue

4

fYear

2005

fDate

4/1/2005 12:00:00 AM

Firstpage

581

Lastpage

586

Abstract

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.

Keywords

MIMO systems; OFDM modulation; fast Fourier transforms; frequency estimation; iterative methods; maximum likelihood estimation; optimisation; radio receivers; MIMO OFDM system; carrier-frequency offset estimation; expectation-maximization based iterative receiver; fast Fourier transform; maximum-likelihood estimation; multiple-input multiple-output; orthogonal frequency division multiplexing; pilot-aided CFO estimation scheme; Frequency division multiplexing; Iterative algorithms; Iterative decoding; MIMO; Maximum likelihood decoding; Maximum likelihood estimation; OFDM; Receiving antennas; Sun; Wireless communication; Carrier-frequency offset (CFO); expectation-maximization (EM) algorithm; multiple-input multiple-output (MIMO); orthogonal frequency-division multiplexing (OFDM);

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOMM.2005.844920

Filename

1425741