Volume 11 Issue 2 ( June )

Finite impulse response (FIR) filter design using multi-rate signal processing (MSP) is an imperative procedure for frequency converter. Designing of decimator and interpolator in multi- rate signal, the outcomes are reducing the complexity but no effect on filter performance. The designing of digital filter is key technique in decimation for multi-rate that is emphasized in this paper. It is analyzed that the performance of filter using direct design method and multi-rate design method. It is found out multi-rate design method is more efficient in all respective over direct design method. In this proposed method FIR filter design using Kaiser Window design technique. By using this technique for filter designing method is more efficient over previous work. It is also shown in multi-rate sampling rate conversion factor 12 in this methodology that is cascaded in form and every phase corresponding to 3, 2 and 2. At the structure design stage it is also shown the requirement of component using multi-rate will be less compared to direct method.

Keywords: Decimator, FIR low pass filter, Kaiser Window, Multi-rate signal processing, Sampling rate conversion.