Optimal joint spatial and temporal power adaptation for space-time-coded systems with imperfect CSI
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review
Author(s)
Related Research Unit(s)
Detail(s)
Original language | English |
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Article number | 6182734 |
Pages (from-to) | 3335-3339 |
Journal / Publication | IEEE Transactions on Signal Processing |
Volume | 60 |
Issue number | 6 |
Publication status | Published - Jun 2012 |
Link(s)
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. © 2012 IEEE.
Research Area(s)
- Beamforming, Multiple-input multiple-output (MIMO), Spatio-temporal power allocation
Citation Format(s)
Optimal joint spatial and temporal power adaptation for space-time-coded systems with imperfect CSI. / Kuang, Quan; Leung, Shu-Hung; Yu, Xiangbin.
In: IEEE Transactions on Signal Processing, Vol. 60, No. 6, 6182734, 06.2012, p. 3335-3339.
In: IEEE Transactions on Signal Processing, Vol. 60, No. 6, 6182734, 06.2012, p. 3335-3339.
Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review