摘要
复准循环平稳信号为具有准周期时变统计特性的复随机信号,它对研究信息系统中的一些非高斯过程有重要意义。本文提出了平滑周期图作为离散时间复循环平稳过程的循环谱估计,并从理论上证明了该估计为相容估计,还导出了其渐近协方差表达式。
Second-order almost cyclostationary complex processes are complex random signals with almost periodically time-varying statistics. Smoothed periodograms are proposed for discrete-time complex 2nd-order cyclostationary processes as cyclic spectral estimation and are shown to be consistent. Asymptotic covariance expressions are derived along with their computable forms.
关键词
非平稳谱分析
复循环平稳序列
非参数谱估计
Nonstationary spectral analysis, Complex cyclostationary sequences, Nonparametric cyclic-spectrum estimation, Consistency, Asymptotic covariance
