A iterative power allocation methode in multiuser MIMO broadcast channel
Résumé
In this paper, sum rate optimization of multiuser multiple-input multiple-output downlink (MUMIMO) communication systems is investigated with perfect channel state information (CSI) at the transmitter. Taking power efficiency into account, the proposed iterative power allocation algorithm aims to optimize the global throughput of the entire system instead of maximizing the minimum weighted individual signal-to-interference-plus-noise ratio (SINR). Simulations show that the sum rate of the proposed method achieves the sum capacity of the MU-MIMO broadcast channel, especially in low signal-to-noise ratio (SNR) region.