摘要
深空通信为了得到高的放大效率,需要使功放运行点在饱和状态,由此产生的功率放大器的非线性,使信号产生了失真,预失真是抵抗信号失真的重要方法。文中根据陆地端发射放大器和空间功率放大器的不同,采用了不同的预失真方式,即分别采用信号预失真和数据预失真,对二者性能进行比较分析。最后得出结论,在不同场景下应该使用的相应的预失真技术。
Power amplifier in deep-space communication would lead to signal distortion. In past decade, much research on power amplifier linearization has been done. In this paper, the different pre-distortion methods are employed, which are based on the difference of ground-station high power amplifier and amplifier in the satellite, and named respectively as signal pre-distortion and data pre-distortion, and then the performances is analyzed separately. Finally, it is concluded that the responding pre-ditortion technologies should be employed when different scenes are present.
出处
《通信技术》
2010年第1期29-31,共3页
Communications Technology
基金
国家高技术863课题基金资助(2007AA01Z299)
关键词
深空通信
功率放大器
预失真
deep-space communication
power amplifier
pre-distortion
