Controlled ripple based design of digital IIR filter

摘要

In this paper, an improved technique for the design of digital infinite impulse response (IIR) filter with controlled ripple response in passband and stopband is presented. A new error function based on the minimization of squared error difference between desired and designed responses of filter with controlled ripple in passband (pb) and stopband (sb), is proposed and for optimizing the error function, a new hybrid optimization technique based on artificial bee colony (ABC) algorithm and quantum particle swarm optimization (QPSO) is proposed. Stability of the designed filter is guaranteed with less complex structure utilized during iterative computation. A comparative study of performance of the developed hybrid technique with classical methods is presented that illustrates the improved performance of the proposed method.