A hardware implementation of LS-CMA adaptive array for high-speed mobile communication

Abstract

The paper presents a hardware implementation of a CMA (constant modulus algorithm) for adaptive arrays as a technique for compensating multipath fading in mobile communication. CMA is the adaptive algorithm which can suppress undesired waves without any preliminary knowledge if the desired signal is a constant envelope signal. The Marquardt nonlinear least-square method using CMA (LS-CMA) is employed for optimizing weights of the array elements. The target of the paper is to implement high-speed mobile communication systems which achieve 2 Mbps. The prototype experimental model demonstrates that a reference signal is not needed in the adaptive algorithm.