New Dual-mode CMA Equalizer

AbstractThe main disadvantage of constant modulus algorithm (CMA) equalizer is that the output error is very large for the transmitted signals with non-constant modulus. So a new dual-mode CMA equalizer is proposed. This equalizer operates with switching the algorithm from traditional CMA to multi-modulus CMA and the condition of switching is based on the decision of the equalizer's output. Comparing with the CMA, the proposed method has the lower residual mean square error (MSE). The efficiency of the method is proved by computer simulations