时变调幅信号的循环平稳特征

Performance for Time-Varying Amplitude Modulation Signal Using Cyclostationary Approach

介绍了一种新的时变幅值调制信号的处理方法——循环平稳信号分析与处理方法 .在给出时变幅值调制信号模型的基础上 ,论证了其具有循环平稳特性 ,进一步分析了其一阶和二阶循环平稳特性 ,给出了相应的计算公式 ,并指出循环自相关函数可以有效地实现解调的功能 .

A new method of time-varying amplitude demodulation by using cyclostationary theory was proposed. Based on a model given for the time-varying amplitude modulation signal, it is verified that the signal is cyclostationary. Farther, the first-order and second-order cyclostationarity were analyzed and the corresponding function was provided. It is emphasized the cyclic autocorrelation function possesses demodulation function for the time-varying amplitude modulation signal. The analysis and the conclusion were verified by simulation and the signal from a vibrating bearing system.