Title :
Modified CIC filter for sample rate conversion in software radio systems
Author :
Abu-Al-Saud, Wajih A. ; Stüber, Gordon L.
Author_Institution :
Sch. of Electr. & Comput. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
fDate :
5/1/2003 12:00:00 AM
Abstract :
Cascaded-integrator-comb (CIC) filters perform sample rate conversion (SRC) efficiently using only additions/subtractions. However, the limited number of tuning parameters may make conventional CIC filters unsuitable for SRC in software radio (SWR) systems. A simple modification to the CIC filter that enhances its SRC performance at the expense of requiring a few extra computations per output sample is proposed. Simulation results show that the modified CIC filter outperforms the conventional CIC filter for the purpose of SRC in SWR systems.
Keywords :
cascade networks; circuit tuning; comb filters; digital filters; integrating circuits; network parameters; radiofrequency filters; signal sampling; software radio; additions/subtractions; cascaded-integrator-comb filters; modified CIC filter; sample rate conversion; simulation results; software radio systems; tuning parameters; Attenuation; Band pass filters; Delay; Dynamic range; GSM; Interpolation; Narrowband; Software radio; Transfer functions; Wideband;
Journal_Title :
Signal Processing Letters, IEEE
DOI :
10.1109/LSP.2003.810023
