Optimal Joint CFO and Channel Estimation for Multiuser MIMO-OFDM Systems

Author

Chen, Jianwu ; Wu, Yik-Chung ; Ng, Tung-Sang

Author_Institution

Dept. of Electr. & Electron. Eng., Univ. of Hong Kong, Hong Kong

fYear

2008

Firstpage

563

Lastpage

567

Abstract

This paper addresses the problem of joint carrier frequency offset (CFO) and channel estimation in multiuser multiple-input multiple-output (MIMO) orthogonal frequency- division multiplexing (OFDM) systems. A joint CFO and channel estimator is derived based on the maximum likelihood (ML) criterion. A computationally efficient method using importance sampling technique is proposed to solve the highly demanding multi-dimensional exhaustive search required by the ML multi- CFO estimation. Simulation results verify the effectiveness of the proposed estimation scheme.

Keywords

MIMO communication; OFDM modulation; channel estimation; frequency estimation; importance sampling; maximum likelihood estimation; multi-access systems; carrier frequency offset estimation; channel estimation; importance sampling; maximum likelihood criterion; multiple-input multiple-output system; multiuser MIMO-OFDM systems; orthogonal frequency-division multiplexing; Channel estimation; Fading; Frequency estimation; Frequency synchronization; MIMO; Maximum likelihood estimation; Monte Carlo methods; OFDM; Oscillators; Transmitting antennas;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2008. ICC '08. IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4244-2075-9

Electronic_ISBN

978-1-4244-2075-9

Type

conf

DOI

10.1109/ICC.2008.111

Filename

4533147