Design of Multiplierless Digital IIR Filter Using Modified Cuckoo Search Algorithm

In this paper, modified cuckoo search (MCS) algorithm is employed for the efficient design of infinite impulse response (IIR) filter by minimizing a fitness function. The fitness function is constructed as mean squared error between ideal and obtained response of the filter. In addition to this, proposed method gives minimum number of adders through canonical signed digit (CSD), and hence makes hardware requirements cost effective. The stability of filter is achieved by incorporating lattice structure because it is easy to perform, when compared with decomposition in small order approach. Efficiency of the filter is found enhanced by comparing the fidelity parameters with previous algorithm, and a detailed analysis is carried with different types of filter.