Title :
Joint Frequency Offset and Channel Estimation in Frequency Selective MIMO Correlated Fading Channels
Author :
Li, Jiandong ; Dong, Wei ; Wang, Fusu
Author_Institution :
Broadband Wireless Commun. Lab., Xidian Univ., Xian
Abstract :
In this paper, we address the problem of frequency offset and channel gains estimation for correlated multi-input multi-output (MIMO) channels. The channel is assumed to be frequency-selective and block fading with both spatial and multipath correlations. A maximum-likelihood (ML) frequency offset (FO) estimator is proposed by using the Baysian approach and the mean and variance of the FO estimation are derived. To evaluate the performance of the FO estimator, its Cramer-Rao lower bound (CRLB) is also developed. Based on the FO estimate, we derive the linear minimum mean square error (LMMSE) channel estimator and analytically investigate the effect of frequency offset estimation error on the mean square error (MSE) performance of the channel estimator. Finally, the performances of the FO and channel estimation are evaluated by simulation results.
Keywords :
MIMO communication; channel estimation; correlation methods; fading channels; frequency selective surfaces; least mean squares methods; maximum likelihood estimation; Baysian approach; Cramer-Rao lower bound; block fading; channel estimation; correlated fading channels; frequency selective MIMO; joint frequency offset; linear minimum mean square error; maximum likelihood frequency offset estimator; Channel estimation; Character generation; Estimation error; Fading; Frequency estimation; MIMO; Maximum likelihood estimation; Mean square error methods; Performance analysis; Wireless communication;
Conference_Titel :
Vehicular Technology Conference, 2009. VTC Spring 2009. IEEE 69th
Conference_Location :
Barcelona
Print_ISBN :
978-1-4244-2517-4
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2009.5073631
