On the Power Allocation of MIMO Channels

In this paper we consider MIMO system with Mt transmitting and Mr receiving antennas, when channel state information (CSI) is known on the transmitter side. The Reyleigh fading channel propagation condition is assumed. In this case, the optimum transmission consists of allocating the transmitted power for each virtual sub-channel related to the corresponding eigenvalue of the channel matrix. The optimum power allocation is computed using the water pouring algorithm (WPA). However, a real-time implementation of the algorithm requires serious computational work, which is O(M2 t ). We propose a modification to WPA that reduces the computational complexity to O(Mt).

• Type: Journal
• Year: 2009
• Where: ICWN
• Authors: Viktor Zaharov, Houssain Kettani
• Keywords: Channel Propagation Condition, Channel State Information, ICWN 2009, Mr Receiving Antennas, Wireless Networks