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Fast Convergent Multimodulus Algorithm for Blind Equalization of QAM Signals

In this paper; the variant of the much celebrated multimodulus algorithm (MMA) is presented for the blind equalization of QAM signals to achieve better performance at high transmission rate. In this course, a new error function is proposed by introducing additional nulls in the existing MMA error function at specific locations which enables the new scheme to achieve low steady state mean squared error (MSE), reduced residual inter symbol interference (ISI) and faster convergence than those of existing MMA. The efficacy of the proposed scheme has been proved through simulation results for 16, 64 and 256-QAM signaling.