电波科学学报2017，Vol.32Issue(1)：65-72,8.DOI:10.13443/j.cjors.2017011001
α稳定分布噪声下数字频移键控信号的分数低阶循环谱分析
Fractional lower order cyclic spectrum analysis of digital frequency shift keying signals under the alpha stable distribution noise
摘要
Abstract
Aiming at the significant degradation of the statistical characteristics of the second and higher order cycle of the digital communication signal in the alpha stable distributed noise environment, the fractional lower-order cyclic spectrum formula of the frequency shift keying(FSK) signal is deduced with the fractional lower-order moments and the covariant theory.Then, the low-order cyclic spectrum characteristics of 2FSK signal under different mixed signal-to-noise ratios, fractional factors and characteristic exponents were analyzed in detail.The theory and simulation results show that the low-order and second-order cyclic spectrum structures of the 2FSK signal are the same, and the peak frequencies of the 2FSK signal are the same, but the amplitude of the spectrum is different that depending on the order factor of the cyclic spectrum.Fractional lower-order cyclic spectrum has stronger anti-interference and applicability to alpha stable distributed noise.关键词
α稳定分布噪声/2FSK信号/分数低阶矩/共变理论/混合信噪比Key words
alpha stable distribution noise/2FSK signal/fractional lower order moment/covariant theory/mixed signal-to-noise ratio分类
信息技术与安全科学引用本文复制引用
刘高辉,张娟娟..α稳定分布噪声下数字频移键控信号的分数低阶循环谱分析[J].电波科学学报,2017,32(1):65-72,8.基金项目
国家自然科学基金(No.61671375) （No.61671375）
