摘要
探讨了周期平稳信号的抽样；推导了样值序列的周期自相关和周期谱，当周期频率为零时，它们分别等于时间平均自相关和时间平均功率谱。从这些自相关和谱当中，可以观察到周期平稳信号抽样的特殊性，这与平稳信号的抽样明显不同。
Discussed in this paper is the sampling of the cyclic stationary signals. The cyclic auto correlation and cyclic spectrum of the sampled sequence are derived, which become time average auto correlation and time average spectrum when the cyclic frequency is set to zero. From all this auto correlation and spectrums, we can observe some properties of the sampling of the cyclic stationary signals, which may be obviously different from those of stationary signals. The results obtained could be helpful to the analysis of signals.
出处
《南京邮电学院学报》
1998年第5期29-32,共4页
Journal of Nanjing University of Posts and Telecommunications(Natural Science)
关键词
随机信号
频谱分析
功率谱
抽样
Random signals, Spectrum analysis, Power spectrum, Sampling
