Abstract
This paper generalizes the modified frequency response masking (MFRM) filter structure for multirate applications. The overall filter is composed of low-delay FIR and IIR filters. A new SDP method is also proposed for designing these MFRM filters. Design results show that the structure and the design method are very useful to reduce the system delay and arithmetic complexity of traditional MFRM filters for multirate application. The application of the low-delay L-band MFRM filters to realize sharp-cutoff Discrete Fourier Transform (DFT) filter bank is also studied.
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