Title :
Optimization of transmit-beam number and power allocation for generic correlated MIMO rayleigh channels
Author :
Li, Jiangyuan ; Zhang, Q.T. ; Song, S.H.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The optimal transmit-beam number and power allocation over generic correlated multiple-input multiple-output (MIMO) Rayleigh fading channels are investigated. By fully exploiting the algebraic structures and properties of the optimization problem, we obtain a procedure for determining the thresholds of optimal beam number and derive a set of elementary equations for optimal power allocation, which can be efficiently solved by using a Broyden-like method. A closed-form criterion for the optimality of beamforming is also proposed. Numerical results are presented for illustration.
Keywords :
MIMO communication; Rayleigh channels; algebra; antenna arrays; channel allocation; channel capacity; correlation methods; optimisation; set theory; Broyden-like method; algebraic structure; channel capacity; closed-form criterion; elementary equation set; generic correlated MIMO Rayleigh fading channel; multiple-antenna system; multiple-input multiple-output system; optimal power allocation; optimization problem; transmit-beam number threshold; transmit/receive correlation; Array signal processing; Channel capacity; Fading; Feedback; MIMO; Rayleigh channels; Signal design; Statistical distributions; Transmitters; Transmitting antennas; Channel capacity, transmitter optimization, transmit/receive correlation, covariance feedback, multipleantenna systems;
Journal_Title :
Communications, IEEE Transactions on
DOI :
10.1109/TCOMM.2009.08.070413
