Title :
Joint estimation of channel response and carrier frequency offset for uplink MIMO OFDMA systems
Author :
Jian Chen ; Xiang Zheng ; Yong Xiong ; Yan-liang Jin
Author_Institution :
Sch. of Commun. & Inf. Eng., Shanghai Univ., Shanghai
Abstract :
An estimator based on expectation maximization (EM) method is presented to jointly estimate carrier frequency offset (CFO) and channel of every antenna of each user in the uplink MIMO OFDMA systems. The proposed method has a very low computational complexity by transforming a multidimensional maximization problem into some smaller one dimensional maximization problems. Simulation results show that the algorithm achieves good performance in estimation accuracy.
Keywords :
MIMO communication; OFDM modulation; channel estimation; expectation-maximisation algorithm; frequency division multiple access; frequency estimation; CFO estimation; MIMO; OFDMA; carrier frequency offset; channel response estimation; expectation maximization method; multiple input multiple output system; orthogonal frequency division multiple access system; Frequency estimation; MIMO; Maximum-likelihood(ML); OFDMA; Uplink;
Conference_Titel :
Wireless, Mobile and Sensor Networks, 2007. (CCWMSN07). IET Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-0-86341-836-5
