An Adaptively Varying Modulus Algorithm Based on SCA for Blind Equalization
Mingzeng Dai · Jisuanji fangzhen · 2008
An adaptively varying modulus algorithm (AVSCA) is proposed for multi-level QAM communication systems. Based on the square contour algorithm (SCA), the algorithm employs an adaptively varying modulus instead of constant modulus for the multi-modulus characteristics of the MQAM. The proposed algorithm adjusts the zero-error contours adaptively according to the decision of the equalizer's output. Analysis and simulations are presented to demonstrate that the AVSCA provides significant equalization improvement in terms of convergence speed and residual inter-symbol interference after equalization convergence.