Concurrent Dithered Signed-Error constant modulus algorithm (DSE-CMA) with Soft Decision Directed (SDD) scheme

The constant modulus algorithm (CMA) has been a widely used in blind equalization because of its LMS-like complexity and robustness. In this paper we propose a new scheme through combining the virtues of two improvement versions of CMA which are the Dithered Signed-Error CMA (DSE-CMA) and the concurrent CMA with Soft Decision Directed scheme (CMA+SDD). The DSE-CMA aims to reduce the computational complexity of the CMA while retaining its robustness and the CMA+SDD is an approach to improve the convergence performance of CMA. The proposed scheme is computationally simpler than the CMA+SDD and provides faster convergence rate than the DSE-CMA.