Paper Info
Title
Optimal Joint Spatial and Temporal Power Adaptation for Space-Time-Coded Systems With Imperfect CSI
Abstract
In this correspondence, a joint optimization of spatio-temporal (S-T) power allocation to minimize the average bit error rate (BER) subject to an average power constraint is developed for beamforming orthogonal space-time block coded multiantenna systems over flat Rayleigh fading channels in the presence of imperfect channel state information at the transmitter (CSIT). Compared to the spatial-only (S-O) power allocation methods, the optimal S-T strategy reduces BER significantly. It can be used as a benchmark to evaluate the existing suboptimal S-T schemes. A necessary and sufficient condition, which can determine the number of eigenbeams being used for optimal S-T power allocation without computing power allocation, is derived. This result can greatly simplify the power allocation algorithm. Numerical results show that the proposed optimal S-T algorithm has not only the best BER performance, but also the lowest computational complexity in comparison with the existing S-T strategies.
Year
DOI
Venue
2012
10.1109/TSP.2012.2190409
IEEE Transactions on Signal Processing
Keywords
Field
DocType
ber performance,rayleigh channels,rayleigh fading channels,csit,beamforming,antenna arrays,array signal processing,computational complexity,eigenbeams,orthogonal space-time block coded multiantenna systems,optimal joint spatial,optimal s-t strategy,imperfect channel state information,space-time block codes,temporal power adaptation,eigenvalues and eigenfunctions,error statistics,spatio-temporal power allocation,multiple-input multiple-output (mimo),average power constraint,bit error rate,transmitters,resource management,signal to noise ratio,resource manager,space time code
Space time,Beamforming,Transmitter,Mathematical optimization,Rayleigh fading,Signal-to-noise ratio,Communication channel,Mathematics,Computational complexity theory,Bit error rate
Journal
Volume
Issue
ISSN
60
6
1053-587X
Citations 
PageRank 
References 
2
0.37
12
Authors
3
Name
Order
Citations
PageRank
Quan Kuang1252.97
S. H. Leung254363.65
Xiangbin Yu317039.05