We consider the power allocation problem for single-user multiple-input multiple-output(MIMO) systems.Assume that the receiver has perfect channel lmowledge

while the transmitter has either mean or covariance of the channel matriz.The channel is modeled as either an uncorrelated Rician fading channel or correlated Rayleigh fading channel.We propose new power allocation algorithms for MIMO systems with channel mean or covariance information at the transmitter n.spactively

through the maximitation of a tight lower bound of the ergodic channel capacity.Simulation results confirm the performance.