一种适用于深空通信的恒包络改进型FQPSK  

A Constant Envelope Enhanced FQPSK Modulation for Deep Space Communication

作　　者：谢智东[1] 张更新[1] 

机构地区：[1]解放军理工大学通信工程学院,南京210007

出　　处：《宇航学报》2009年第3期1095-1100,1158,共7页Journal of Astronautics

基　　金：国家自然科学基金(60472049);教育部留学回国人员科研启动基金(教外司留[2005]383)

摘　　要：由于非线性和功率受限问题,深空通信中需要采用恒包络调制方式。FQPSK作为一种准恒包络调制技术受到广泛关注,但其信号包络仍有波动。文章在简要介绍FQPSK和增强型FQPSK基本原理的基础上,提出了一种恒包络改进型FQPSK,通过理论分析和计算机仿真证明了该调制方式具有完全恒定的包络,能够显著提高功率放大器的功率效率,频谱性能优于FQPSK;当采用OQPSK接收机接收时,其误码率性能比FQPSK提高1dB左右。The high power efficiency is more important for deep space communication than others communication systems. FQPSK is a new quasi constant envelope modulation and can be used for deep space communication. Firstly, the basic principle of FQPSK and Enhanced FQPSK was introduced. Then, a new constant envelope enhanced FQPSK was presented. Lastly, the per- formance of the new modulation was justified by analysis and computer simulation. It outperforms conventional FQPSK in both frequency efficiency and end to end bit error ratio performance.

关 键 词：深空通信 恒包络调制 FQPSK 恒包络改进型FQPSK 

分 类 号：TN911[电子电信—通信与信息系统]