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http://dx.doi.org/10.7471/ikeee.2013.17.2.145

Interference Cancellation System in Wireless Repeater Using Complex Signed Signed CMA Algorithm  

Han, Yong Sik (Dept. of Information & Communications, Gumi University)
Publication Information
Journal of IKEEE / v.17, no.2, 2013 , pp. 145-150 More about this Journal
Abstract
In the paper, we propose a new CSS(Complex Signed-Signed) CMA(Constant Modulus Algorithm) algorithm for ICS(Interference Cancellation System). When the repeater get the feedback signal, the CSS CMA algorithm is proposed at the ICS repeater using DSP(Digital Signal Processing) for the removal of interfering signals from the feedback paths. The proposed CSS CMA algorithm improved performances and hardware complexity by adjusting step size values. the steady state MSE(Mean Square Error) performance of the proposed CSS CMA algorithm with step size of 0.00043 is about 4dB better than the conventional CMA algorithm. And the proposed Complex Signed Signed CMA algorithm requires 1950 ~ 2150 less iterations than the LMS(Least Mean Square) and Signed LMS(Normalized Least Mean Square) algorithms at MSE of -25dB.
Keywords
Constant Modulus Algorithm; Complex Signed Signed CMA; Least Mean Square; Repeater; Interference Cancellation System(ICS);
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