Abstract

In this paper, an optimal design of digital infinite impulse response (IIR) with controlled ripple responses in passband (pb) and stopband (sb) is presented. An improved error function defined as mean squared error (MSE) between ideal and designed responses of a filter along with controlled ripple in passband and stopband is proposed and minimized. It is optimized using cuckoo search (CS) algorithm, which is tuned by experimental analysis. The results obtained reveals that high stopband attenuation (A s ) can be achieved using the controlled ripple, however the passband error (e p ) and stopband error (e s ) are also increased.

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