Title :
A High Speed Digital Decimation Filter with Parallel Cascaded Integrator-Comb Pre-Filters
Author_Institution :
Electr. Eng. Dept., Univ. of California, Los Angeles, CA, USA
Abstract :
Parallel cascaded integrator-comb (CIC) pre-filters are proposed to greatly increase the speed of digital decimation filters. Several times of clock rate improvement can be achieved by paralleling computations. Unlike traditional poly-phase parallel decomposition, the new method avoids the substantial area/complexity increase, as a consequence of converting to parallel structure, by exploiting the simple and effective recursive filtering of the CIC pre-filters. With these two methods combined, the new filter achieves unprecedented clock rate and considerable area/complexity savings while providing frequency response similar to those of traditional decimation filters.
Keywords :
cascade networks; comb filters; frequency response; recursive filters; CIC; clock rate improvement; frequency response; high speed digital decimation filter; parallel cascaded integrator-comb pre-filter; polyphase parallel decomposition; recursive filtering; Attenuation; Band pass filters; Bandwidth; Clocks; Concurrent computing; Digital filters; Filtering; Frequency response; GSM; Sampling methods;
Conference_Titel :
Image and Signal Processing, 2009. CISP '09. 2nd International Congress on
Conference_Location :
Tianjin
Print_ISBN :
978-1-4244-4129-7
Electronic_ISBN :
978-1-4244-4131-0
DOI :
10.1109/CISP.2009.5301187
