论文:2014,Vol:32,Issue(6):962-966
引用本文:
唐成凯, 廉保旺, 张玲玲. 卫星通信中16APSK调制下带有记忆性的后置预失真算法[J]. 西北工业大学学报
Tang Chengkai, Lian Baowang, Zhang Lingling. Post Predistortion of 16APSK Modulation with Memory and Nonlinear Effect in Satellite Communication[J]. Northwestern polytechnical university

卫星通信中16APSK调制下带有记忆性的后置预失真算法
唐成凯1, 廉保旺1, 张玲玲2
1. 西北工业大学 电子信息学院, 陕西 西安 710072;
2. 西北工业大学 航海学院, 陕西 西安 710072
摘要:
针对卫星星载功率放大器工作在饱和区域所造成的卫星传输信号非线性特性,以及传统的前置预失真器由于延时、高阶信号调制等原因,不能完全消除功率放大器的非线性影响与记忆效应。提出了一种可用于多幅度高阶信号调制的后置预失真器算法,该算法通过建立多变量矩阵后置预失真器来消除功率放大器的非线性影响和记忆性影响。从误码率、功率谱和星座图3个方面对所设计的后置预失真器进行性能分析,仿真结果表明后置预失真器可以有效消除高阶调制信号的非线性影响和记忆性影响,在实际应用领域拥有较高的价值。
关键词:    卫星通信    预失真    记忆性非线性信道    高阶信号调制    16APSK   
Post Predistortion of 16APSK Modulation with Memory and Nonlinear Effect in Satellite Communication
Tang Chengkai1, Lian Baowang1, Zhang Lingling2
1.Department of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710072, China;
2.College of Marine Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Abstract:
Satellite power amplifier working in the saturation region causes nonlinear effect and traditional predistor-tion cannot eliminate the nonlinear effect due to delay,high order modulation and so on. We propose post predistor-tion algorithm that can be used in high order modulation and that can perfectly remove the nonlinear effect of satel-lite power amplifier. Simulation results and their analysis in three respects (bit error rate,power spectrum and con-stellation) show preliminarily our proposed post predistortion can eliminate the effect and memory of satellite poweramplifier.
Key words:    bit error rate    design    errors    functions    iterative methods    matrix algebra    mean square error    poweramplifiers    power spectrum    satellite communication systems    signal to noise ratio    time delay    highorder modulation    nonlinear channel    predistortion   
收稿日期: 2014-05-28     修回日期:
DOI:
基金项目: 国家自然科学基金(61202394、61301094);西工大研究生创业种子基金(Z2012097)资助
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作者简介: 唐成凯(1985-),西北工业大学博士研究生,主要从事卫星通信中的星间链路、预失真研究。
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相关文献:
1.唐成凯, 廉保旺, 张玲玲.卫星通信中动态神经网络预失真算法研究[J]. 西北工业大学学报, 2013,31(1): 34-39