摘要
研究了用"均方误差(MSE)准则"将星载放大器的非线性和正交频分复用(OFDM)信号的高峰值平均功率比(峰均比,PAPR)结合在一起,代替仅以PAPR作为衡量准则的传统方法,仿真结果表明,"MSE准则"可以有效改善OFDM卫星通信系统性能,在信道条件差改善信号的非线性畸变度的同时,能够对抗多径衰落,MSE准则的选择性映射法比PAPR准则的选择性映射法性能改善2dB。信道条件好时,单载波频分多址接入(SC-FDMA)系统性能要比OFDM系统好约0.4dB。OFDM技术的卫星应用为星地融合通信提供了技术途径。
The paper researches the MSE(mean square error)criterion which combines the non-linearity of high power amplifier and the PAPR(peak to average power ratio)of OFDM(Ortho-gonal Frequency Division Multiplexing)signals to substitute PAPR criterion.The simulation results show that MSE criterion method can improve the system performance obviously,in multi-path channel condition,the system has 2dB better performance than PAPR criterion system.In good channel condition,SC-FDMA(single-carrier frequency division multiple access)system has 0.4dB better performance than OFDM system.The OFDM application for satellite can push forward the technique fusion of satellite communication and ground communication.
作者
王晨
何善宝
尹伟臻
李殷乔
WANG Chen;HE Shanbao;YIN Weizhen;LI Yinqiao(Institute of Telecommunication Satellite,China Academy of Space Technology,Beijing 100094,China;Beijing Institute of Spacecraft System Engineering,Beijing 100094,China)
出处
《航天器工程》
CSCD
北大核心
2019年第1期98-102,共5页
Spacecraft Engineering
