摘要
在高斯信道下,幅度受限系统的最佳发送功率选择会直接影响系统性能:信号功率太低会被噪声淹没,功率太高会进入非线性畸变范围,产生信号失真.针对这个问题,通过分析幅度受限系统的信号噪声畸变比(signal to noise-and-distortion rate,SNDR),提出了一种最优信号功率的选择方法.仿真结果表明,采用基于最大SNDR准则的信号功率选择能够获得最好的系统性能.
Transmit power selection method for the amplitude-limited system in Gauss channel was studied. In this environment, signals with low transmit power were suppressed by white noise, while signals with high transmit power entered the non-linear area of power amplifier and generate signal distortion. A new method was proposed to solve this problem based on maximum SNDR criterion. Simulation results show that the proposed method can optimize system performance.
基金
国家重点基础研究发展(973)计划(2007CB310602)资助
