TY - GEN
T1 - Optimal transmit-beam number and power allocation for correlated MIMO rayleigh fading channels
AU - Li, Jiangyuan
AU - Zhang, Q. T.
PY - 2008
Y1 - 2008
N2 - Although optimal transmit directions over generic correlated multiple-input multiple-output (MIMO) Rayleigh fading channels are well known to be the eigen beams defined by the transmit covariance matrix, general techniques for determining optimal transmit-beam number and power allocation remain unavailable. In this paper, by formulating the problem in the framework of Lagrange multipliers and by fully exploiting the algebraic structures and properties of the optimization problem at hand, we obtain a simple criterion for optimal beam number determination and a set of elementary equations for optimal power allocation, which can be efficiently solved by using the recursive algorithm derived in this paper. Numerical results are presented for the illustration of the theory. ©2008 IEEE.
AB - Although optimal transmit directions over generic correlated multiple-input multiple-output (MIMO) Rayleigh fading channels are well known to be the eigen beams defined by the transmit covariance matrix, general techniques for determining optimal transmit-beam number and power allocation remain unavailable. In this paper, by formulating the problem in the framework of Lagrange multipliers and by fully exploiting the algebraic structures and properties of the optimization problem at hand, we obtain a simple criterion for optimal beam number determination and a set of elementary equations for optimal power allocation, which can be efficiently solved by using the recursive algorithm derived in this paper. Numerical results are presented for the illustration of the theory. ©2008 IEEE.
KW - Channel capacity
KW - Covariance feedback
KW - Multiple-antenna systems
KW - Transmit/receive correlation
KW - Transmitter optimization
UR - http://www.scopus.com/inward/record.url?scp=51249118232&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-51249118232&origin=recordpage
U2 - 10.1109/ICC.2008.796
DO - 10.1109/ICC.2008.796
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 9781424420742
SP - 4240
EP - 4244
BT - IEEE International Conference on Communications
T2 - IEEE International Conference on Communications, ICC 2008
Y2 - 19 May 2008 through 23 May 2008
ER -