Improved Performance of CIC Filter in Sample Rate Conversion of Software Radios
WU Dong-liang · Jisuanji fangzhen · 2006
This paper describes a method for improving performance of Cascaded-integrator-comb CIC filter in sample rate conversion(SRC) of software radios.The software radio has high flexibility and open system of wireless communication.Conventional CIC filter can perform SRC efficiently using addition and subtraction.CIC(cascaded integrator-comb) filter has better mixing-resisting and image resisting performance.The conventional CIC filter is not suitable for software radios.This paper analyzes the structure of conventional CIC filter and existing modified method.By controlling the delay of CIC filter comb stage,this paper analyses the getting value of SRC and delay list.It can provide better side-lobe suppression and image frequencies attenuation using reasonable plan of getting value and it can be shown via MATLAB.