Abstract: 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.

Key words: power allocation, amplitude-limited system, nonlinear distortion suppression