Analysis and design of FIR ADM digital filters

Abstract

Realization of nonrecursive digital filters using adaptive delta modulator as an analog/digital converter has been studied. This filter requires no multiplication and offers many advantages over conventional PCM filters in low power consumption, small size, and cost effectiveness. Analytical equations have been derived for the expected mean-squared errors and word length necessary to achieve the predicted optimum performance. Computer simulation has been done to verify the analytical results of performance analysis. In addition, design of an FIR ADM digital low-pass filter that can be used for filtering multi-channel speech signals has been considered.