Design of Cascade Integrator Comb Filter Based on FPGA
Chengchang Zhang · Jisuanji fangzhen · 2009
The Cascaded Integrator Comb filter is an efficient filter widely used for decimation or interpolation in the application of Software Radio.It is mainly used to reduce or improve the sample frequency and can be used as a low pass filter.For the multi-rate signal processing in software radio and in order to reduce sample rate,firstly this paper describes the key points of Cascade Integrator Comb(CIC) filter theory,then a detailed CIC filter's design and implementation method based on FPGA are given.Secondly the filter is simulated and synthesized with the FPGA using the VHDL language and its simulation results are given.This result of simulation shows that the design is effective and practical.Finally it is used in the development of circuit of DDC successfully.