Multiplierless realization of bandpass and bandstop digital filters transformed from all-pole lowpass filters

In our earlier investigations on developing multiplierless structures for digital recursive filters, we have shown that utilizing low-sensitivity structures and appropriate transformations it is possible to generate multiplierless implementations of bandpass and bandstop filters. The schemes are quite attractive when we allow marginal deviations in the specifications, or start with a design of marginally stricter specifications than the desired specification without any increase in the filter order leading to quite low requirements of nonzero bits. We present results for the structure that employs the low-sensitivity characteristics of the all-pole type of structure for developing multiplierless implementations of bandpass and bandstop digital recursive filters transformed from all-pole lowpass filters.