研究了幅度受限环境下MIMO（Multiple-Input Multiple-Output）系统的功率分配策略，提出了一种适用于该环境的功率分配算法。该算法充分考虑了功放特性，能够抑制限幅引起的非线性失真，更加合理地分配资源。仿真结果也表明，在幅度受限环境下，信号功率接近限幅门限时，传统的注水算法性能会有明显的恶化，而新算法能够保持最优性能。

Power allocation strategy for amplitude-limited MIMO system is studied and a new power allocation method is proposed. In this new method, nonlinear distortion caused by amplitude limiting is taken into account to improve the transmission quality. Simulation results also show that when the amplitude of transmit signal is large, the performance of traditional water-filling method will degrade obviously while the new method could provide better performance.