中文说明：降低OFDM系统误码率，剖析了OFDM系统在非线性失真影响下的PAPR过高的原因和影响，以及消除多普勒频移和多普勒扩展对 OFDM 系统的影响，并针对两个方面进行相应的性能改善工作，降低PAPR以及多普勒频移的影响，减少了以往方法带来的不良影响，进而改善了OFDM通信系统的性能。
English Description：
In order to reduce the BER of OFDM system, the reason and influence of high PAPR of OFDM system under the influence of nonlinear distortion are analyzed, and the influence of Doppler shift and Doppler spread on OFDM system is eliminated In order to reduce the influence of PAPR and Doppler shift, and reduce the adverse effects of previous methods, the performance of OFDM communication system is improved.