A unified analysis of multirate and periodically time-varying digital filters
R. Meyer, C.S. Burrus · IEEE Transactions on Circuits and Systems · 1975
A unified approach to the analysis of periodically timevarying digital filters is introduced. It is shown that this method may be used to describe both time and frequency domain responses. By considering multirate filters as a special class of periodically time-varying filters we have characterized the frequency response of a general multirate filter. A time domain synthesis procedure for periodically varying difference equations is also presented.