Unlike conventional spectrum analysis for stationary signals, CSP has three kinds of resolutions that must be considered in all CSP applications, not just two.

In this post, we look at the ability of various CSP estimators to distinguish cycle frequencies, temporal changes in cyclostationarity, and spectral features. These abilities are quantified by the *resolution properties* of CSP estimators.

### Resolution Parameters in CSP: Preview

Consider performing some CSP estimation task, such as using the frequency-smoothing method, time-smoothing method, or strip spectral correlation analyzer method of estimating the spectral correlation function. The estimate employs seconds of data.

Then the *temporal resolution* of the estimate is approximately , the *cycle-frequency resolution* is about , and the *spectral resolution* depends strongly on the particular estimator and its parameters. The *resolution product* was discussed in this post. The fundamental result for the resolution product is that it must be very much larger than unity in order to obtain an SCF estimate with low variance.

Continue reading “Resolution in Time, Frequency, and Cycle Frequency for CSP Estimators”