Design and efficient implementation of high-speed narrow-band recursive digital filters using single filter frequency masking techniques

ABSTRACT In this paper a novel structure for frequency masking based on a single filter is introduced. By using the proposed frequency masking approach the maximal sample frequency for narrow-band recursive digital filters is increased. This increase in sample frequency can be utilized either for faster filters or for lower power consumption by trading excess speed for low power. As the subfilters are identical (except for the number of delays), the filter can be mapped onto a single hardware structure which leads to area-efficient implementation.