LOW SENSITIVITY DESIGN OF MULTIPLIERLESS ELLIPTIC IIR DIGITAL FILTERS
Valentina Ilieva Anzova · 2005
In this paper an improved method of design of low sensitivity multiplierless elliptic IIR digital filters is proposed. The design technique is based on the sensitivity analysis and a selection of proper allpass sections. The allpass sections used to realize the allpass structures are with minimized sensitivities. Using the symbolic analysis, the expressions for phase sensitivities to multiplier coefficients for the selected allpass sections have been derived. The amplitude sensitivities of the obtained realizations have been investigated. The comparison between the resulted digital multiplierless IIR filters has been made for different coefficients wordlength. The results are confirmed experimentally.