DESIGN OF EQUIRIPPLE FIR FILTER USING PARKS-MCCLELLAN REMEZ ALGORITHM

This paper design the Finite Impulse Response Digital Filters using Optimal Equiripple Method. It can be seen that the stopband attenuation is good and it has narrow transition width; these characteristics can be modified by increasing the filter order or by changing the filter specifications. Thus the resulting filter response have ripple of equal magnitude in both passband and stopband. Also, this method is very powerful, very flexible and offers lower filter order that meet the design specifications than the other methods. The Remez algorithm also called the Remez exchange algorithm or Park-McClellan procedure. The Remez algorithm in effect goes a step beyond the minimax approximation algorithm to give a slightly finer solution to an approximation problem. The advantage of this algorithm is to obtain minimum length and to reduce computational cost and reduce noise by increasing efficiency of the filter.