Title :
Effects of channel estimation error on array processing based QO-STBC coded OFDM systems
Author :
Zhang, Haixia ; Yuan, Dongfeng ; Chen, Hsiao-Hwa ; Nossek, Josef A.
Author_Institution :
WMCT Lab., Shandong Univ., Jinan
fDate :
4/1/2009 12:00:00 AM
Abstract :
This letter addresses the issues on performance degradation caused by channel estimation error of quasiorthogonal space-time block (QO-STBC) coded OFDM systems employing array processing decoder. The least square (LS) channel estimator is employed to obtain the required channel state information (CSI). Taking mean square error (MSE) as a performance metric, we evaluate the performance of the LS estimator in MIMO-OFDM systems over frequency selective channels, and its impact on symbol error rate (SER) using both analysis and simulations.
Keywords :
MIMO communication; OFDM modulation; array signal processing; block codes; channel estimation; error statistics; least squares approximations; mean square error methods; orthogonal codes; space-time codes; MIMO-OFDM systems; array processing decoder; channel estimation error; channel state information; frequency selective channels; least square channel estimator; mean square error; quasiorthogonal code; space-time block code; symbol error rate; Array signal processing; Channel estimation; Channel state information; Decoding; Degradation; Frequency estimation; Least squares approximation; Mean square error methods; OFDM; State estimation; Array processing, QO-STBC, LS channel estimator, channel state information.;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2009.081031
