收稿日期: 2016-09-28
修回日期: 2016-12-11
网络出版日期: 2017-05-30
基金资助
国家自然科学基金（No.61471294）；总装预研基金（No.914A2104011HT05336）资助
Modulation Recognition of Double Satellite Signals in Alpha-Stable Distribution Noise
Received date: 2016-09-28
Revised date: 2016-12-11
Online published: 2017-05-30
针对现有基于循环谱的单信号调制识别方法在Alpha稳定分布噪声下失效的问题，提出一种基于广义二阶循环谱的双信号识别方法。首先分析广义二阶循环谱对Alpha稳定分布噪声的不敏感性，在此基础上再分析待识别混合双信号的谱特性，提取其循环频率域脉冲谱线特征构成特征参量，最后通过检测脉冲谱线数量实现双信号的调制识别。仿真结果表明，该方法在Alpha稳定分布噪声和高斯噪声下都有良好的识别性能。
关键词： Alpha稳定分布噪声; 双信号; 广义二阶循环谱; 调制识别
杨伟超, 杨新权 . Alpha稳定分布噪声下卫星双信号调制识别[J]. 应用科学学报, 2017 , 35(3) : 309 -316 . DOI: 10.3969/j.issn.0255-8297.2017.03.004
Modulation recognition algorithms of single signal based on second-order cyclic spectrum does not work in an Alpha-stable distribution noise environment. To deal with the problem, a recognition algorithm based on general second-order cyclic spectrum for double signals is proposed. Insensitivity of general second-order cyclic spectrum to Alphastable distribution noise is analyzed, and spectral properties of the double signals are then studied. Pulse spectral lines in the cyclic frequency domain of spectrum are extracted to be used as characteristic parameters for recognition. Modulation recognition of the double satellite signals is achieved by detecting the number of pulse lines. Simulation results show that the proposed algorithm has good performance in the two kinds of noise.
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