Abstract: “The Finite Impulse Response (FIR) filter is a digital filter widely used in Digital Signal Processing applications in various fields like imaging, instrumentation, communications, etc. Programmable digital processors signal (PDSPs) can be used in implementing the FIR filter. However, in realizing a large-order filter many complex computations are needed which affects the performance of the common digital signal processors in terms of speed, cost, flexibility, etc. By using Kaiser window attempt is made to reduce the sidelobe level & control by modifying nth order Bessel function I0(x)& controlling the shape factor by adjustable parameter α. Few dB sidelobe level response is also reduced. In this paper the design of digital FIR filter has been discussed.”

Keywords: FIR filter, digital filters, FPGA, Kaiser Window, passband, stopband