Design of Low Pass FIR Filter Using D.E. Algorithm

Digital filters are frequency selective system which is used to pass a certain range of frequency and to stop another range of frequency. They are actually characterized by their impulse responses. Depending upon the duration of the impulse response, digital filter are classified as Finite ?Duration Impulse Response (FIR) and Infinite Duration Impulse Response (IIR) filters. Stable and linear phase FIR filter can be implemented quite easily under certain constraints. These properties of FIR filter make it very much attractive for use in various digital communication systems. In mobile being used as transmitting pulse shaping filter. Different techniques have been used for the design of FIR filter, which includes window based method frequency sampling method and various evolutionary algorithms are also being used for this purpose. The use of different optimization technique, such as Genetic Algorithm (G.A.), Particle Swarm Optimization (PSO) has been proved to be quite useful towards the design of these digital filters with certain specification. But using D.E. algorithm we will design low pass FIR filter are also quite possible and by using this algorithm we will also reduce the effect of ISI in pulse shaping filter.