Efficient digital filtering architectures using pipelining/interleaving

A pipelining/interleaving (PI) technique is developed for efficient digital filtering. By using a clock rate that is K times the data rate and with interleaved feedback of the output samples, a single expanded digital filter H(z/sup K/) can be made equivalent to a cascade of k identical filters H/sup k/(z) 1/spl les/k/spl les/K. The PI technique is used for designing Kalser-Hamming sharpened linear-phase FIR filters with very high performance. It can also be applied in efficient IIR filtering to alleviate the critical-loop limitation on system clock rates. Furthermore, the PI technique is applicable to designing efficient multirate signal processing systems.