DocumentCode :
1045202
Title :
Performance of iterative data detection and channel estimation for single-antenna and multiple-antennas wireless communications
Author :
Buzzi, Stefano ; Lops, Marco ; Sardellitti, Stefania
Author_Institution :
DAEIMI, Univ. degli Studi di Cassino, Italy
Volume :
53
Issue :
4
fYear :
2004
fDate :
7/1/2004 12:00:00 AM
Firstpage :
1085
Lastpage :
1104
Abstract :
In iterative data-detection and channel-estimation algorithms, the channel estimator and the data detector recursively exchange information in order to improve the system performance. While a vast bulk of the available literature demonstrates the merits of iterative schemes through computer simulations, in this paper analytical results on the performance of an iterative detection/estimation scheme are presented. In particular, this paper focus is on uncoded systems and both the situations that the receiver and the transmitter are equipped with either a single antenna or multiple antennas are considered. With regard to the channel estimator, the analysis considers both the minimum mean square error and the maximum likelihood channel estimate, while, with regard to the data detector, linear receiver interfaces are considered. Closed-form formulas are given for the channel-estimation mean-square error and for its Crame´r-Rao bound, as well as for the error probability of the data detector. Moreover, the problem of the optimal choice of the length of the training sequence is also addressed. Overall, results show that the considered iterative strategy achieves excellent performance and permits, at the price of some complexity increase, the use of very short training sequences without incurring any performance loss. Finally, computer simulations reveal that the experimental results are in perfect agreement with those predicted by the theoretical analysis.
Keywords :
antenna arrays; channel estimation; error statistics; iterative methods; least mean squares methods; maximum likelihood estimation; probability; radio networks; radio receivers; radio transmitters; Cramer-Rao bound; error probability; iterative data detection; linear receiver interfaces; maximum likelihood channel estimation; minimum mean squared error; multiple-antenna wireless communications; single-antenna wireless communications; Channel estimation; Computer simulation; Detectors; Iterative algorithms; Maximum likelihood detection; Performance loss; Receiving antennas; Recursive estimation; Transmitting antennas; Wireless communication; CRB; Channel estimation; Cramér–Rao bound; data detection; multiantenna systems; wireless communication;
fLanguage :
English
Journal_Title :
Vehicular Technology, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9545
Type :
jour
DOI :
10.1109/TVT.2004.830144
Filename :
1317212
Link To Document :
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