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Optimal power allocation for transmitter selection in MISO Rayleigh fading channels

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4 Author(s)
Kumar, V.V.M.N. ; EC Dept., Int. Inst. of Inf. Technol. - Hyderabad, Hyderabad ; Reddy, P.H. ; Khan, M. ; Srinivas, M.B.

In this paper we derive optimal power allocation (PA) in space and time that minimizes BER for transmitter selection in multi-input-single-output (MISO) Rayliegh fading channels assuming perfect channel state information (CSI) is available at receiver and transmitter. This power allocation scheme achieves exponential diversity order with a single RF front end and requires feedback of the best channel only. The presented scheme results in 7.5 dB gain over optimal single-input-single-output (SISO) power allocation scheme for 4-QAM modulation at SER of 10-4.

Published in:

Sarnoff Symposium, 2007 IEEE

Date of Conference:

April 30 2007-May 2 2007