Title: An improved wideband CIC filter design of software radio receivers

Authors: Min-Wei Qin; Jia-Mei Feng; Yuan-Cheng Yao; Jian-Hao Hu

Addresses: School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China. ' School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China. ' School of Information Engineering, Southwest University of Science and Technology, Mianyang 621010, China. ' National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China, Chengdu 611731, China

Abstract: This paper presents a second-order CIC compensation filter which is based on Jovanovic's grading technique. We have considered the simplest sharpening polynomial to improve the stop-band characteristic and the grading technique compensated for the pass-band characteristic. The main idea of improved CIC filter is based on the foundation of grading polynomial, and a double frequency compensating function to get nice frequency characteristic. The proposed wideband CIC filter has small attenuation with its main lobe bandwidth, and great attenuation with the side lobe. A number of demonstrated characteristics make the proposed structure a good candidate for Software Defined Radio (SDR) applications.

Keywords: wideband CIC filters; grading technique; SDR; software defined radio; wireless communications; mobile computing.

DOI: 10.1504/IJWMC.2012.047964

International Journal of Wireless and Mobile Computing, 2012 Vol.5 No.3, pp.263 - 270

Received: 05 Jan 2012
Accepted: 25 Feb 2012

Published online: 16 Jul 2012 *

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