Title :
The effect of channel estimator memory mismatch on the performance of MLSE in wireless data communications
Author :
Lee, Yumin ; Chen, Jyh-Hau
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
The maximum likelihood sequence estimator (MLSE) has been shown to be an effective measure against inter-symbol interference. An estimate of the discrete-time equivalent channel is usually required in order to perform sequence estimation. In practice, the length (or memory) of the channel is unknown to the receiver for wireless communication channels. In this paper, upper and lower bounds for the performance loss due to channel estimator memory mismatch are derived for unbiased estimators, while approximate expressions for the irreducible BER floor caused by channel estimator memory mismatch are derived for biased estimators. Simulation results are also provided for random channels to verify the correctness of the analysis
Keywords :
data communication; equalisers; error statistics; interference suppression; intersymbol interference; maximum likelihood sequence estimation; radio networks; telecommunication channels; BER; ISI; MLSE; biased estimators; bounds; channel estimator memory mismatch; discrete-time equivalent channel; inter-symbol interference; maximum likelihood sequence estimator; random channels; receiver; unbiased estimators; wireless data communications; Analytical models; Bit error rate; Channel estimation; Data communication; Equalizers; Gaussian noise; Interference; Maximum likelihood estimation; Performance loss; Wireless communication;
Conference_Titel :
Communications, 2002. ICC 2002. IEEE International Conference on
Conference_Location :
New York, NY
Print_ISBN :
0-7803-7400-2
DOI :
10.1109/ICC.2002.996832
