Title :
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
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;
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
DOI :
10.1109/ICC.2008.111
