Low-power FIR filter realization with differential coefficients and inputs

This brief presents a low-power finite-impulse response filter design by us ing differential coefficients and inputs instead of using them directly suc h that fewer bits are required, thereby reducing the size of arithmetic uni ts and power dissipation. Ne present an improved algorithm to effectively g enerate differential coefficients so that the differential coefficients met hods can be applied to full bandwidth (BW) of filters instead of only narro w-band filters in previous approaches. Simulations with fixed coefficient f ilters indicate reduction in transition activity ranging from 1-53% over th e full range of filter BW's, The presented results can be applied to adapti ve filters to generate suitable differential coefficients.