Open AccessModified CIC Filter for Rational Sample Rate Conversion
Author(s) -
Gordana Jovanovic Dolecek
Publication year - 1970
Publication title -
ecti transactions on computer and information technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.132
H-Index - 2
ISSN - 2286-9131
DOI - 10.37936/ecti-cit.201041.54220
Subject(s) - decimation , cascaded integrator–comb filter , software defined radio , raised cosine filter , filter (signal processing) , computer science , filter design , root raised cosine filter , butterworth filter , mathematics , prototype filter , electronic engineering , algorithm , telecommunications , engineering , computer vision
The modification of the conventional CIC (cascadedintegrator-comb) filter for rational sample rate conversion (SRC) in software defined radio (SWR) systems is presented here. The conversion factor is a ratio of two mutually prime numbers, where the decimation factor M can be expressed as a product of two integers. The overall filter realization is based on a stepped triangular form of the CIC impulse response, the corresponding expanded cosine filter, and sine-based compensation filter. This filter performs sampling rate conversion efficiently by using only additions/subtractions making it attractive for software defined radio (SWR) applications.