基于卫星信道的APSK调制研究  

Analysis of APSK Modulation Based on Satellite Channel

作　　者：宫晓妍[1] 刘建伟[1] 杨友福[1] 

机构地区：[1]北京航空航天大学电子信息工程学院,北京100083

出　　处：《遥测遥控》2009年第6期10-14,共5页Journal of Telemetry,Tracking and Command

摘　　要：幅相键控(APSK)调制作为一种QAM与PSK调制的结合方法,既减小了对放大器非线性的敏感性,又提高频谱利用率,已经在宽带卫星通信中得到广泛关注。介绍APSK调制的信号特性,重点分析16APSK的星座图优化问题,并提出一种新的搜索最小欧氏距离的方法。针对卫星信道中的非线性问题,进行了预失真矫正。仿真结果充分表明,经过预失真补偿后的APSK调制在卫星信道中具有优越性。As a combination of QAM and PSK,the Amplitude Phase Shift Keying(APSK)modulation reduces the sensitivity to non-linear element while enhances the bandwidth efficiency.In this paper,the signal characteristic of APSK modulation is analyzed,especially the optimal design of APSK signal constellation.Then a new method to search the minimum Euclidean distance is proposed.In the satellite channel,we make a pre-distortion.The simulation results show that the APSK modulation has a superior performance in the satellite communication.

关 键 词：APSK调制 星座图 最小欧氏距离 预失真补偿 卫星通信 

分 类 号：TN927.2[电子电信—通信与信息系统]