摘要
近年来,正交频分复用技术以良好的抗多径衰落能力和极高的频谱利用率,成为大家研究的热点.但高峰均功率比(PA-PR)的存在,对高功率放大器的线性度提出很高的要求.若高功率放大器的动态范围不能满足信号的变化,将会使系统性能下降.本文提出一种降低非线性失真的方案,并验证该方案的有效性.
In recent years, there has been increasing interest in OFDM （orthogonal frequency division multiplexing） in terms of considering its various advantages in combating the severe effects of the frequency selective fading and having very high frequency efficiency. However, the OFDM suffers from the strong sensitivity to the nonlinear distortion, introduced by the transmitting high power amplifier （HPA）, since the OFDM has the high peak-to-average power ratio （PAPR）. The performance of the system will be decreased, if the linear scope of the HPA is not large enough. We propose a new approach to compensate the nonlinearity, which has been verified by computer simulations.
出处
《微计算机信息》
北大核心
2007年第27期143-144,213,共3页
Control & Automation
基金
河南省重点科技攻关项目无线移动通信中多天线正交频分复用峰均比降低算法研究(0623051400)
