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

Volume

10

Issue

5

fYear

2003

fDate

5/1/2003 12:00:00 AM

Firstpage

152

Lastpage

154

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;

fLanguage

English

Journal_Title

Signal Processing Letters, IEEE

Publisher

ieee

ISSN

1070-9908

Type

jour

DOI

10.1109/LSP.2003.810023

Filename

1193037