Abstract: Digital filtering plays a significant role in the world of technology. Therefore, processing of input signal has to be done to get useful signal. This paper deals with the design of finite impulse response digital filter using window techniques Rectangular, Hanning and Bartlett of order (15) are presented. It shown that filterdesign by using Rectangular Window Technique is better as it provides better result in terms of magnitude, phase, impulse, step responses and pole-zero plot.[1]

Keywords: FIR Filter, DSP, FFT, Hanning Window, MATLAB, Rectangular Window, Bartlett Window, frequency sampling, amplitude-frequency.