A BLIND ADAPTIVE ARRAY BASED ON CMA AND LMS

In this paper,an adaptive array is proposed in which the CMA (Constant Modulus Algorithm) and LMS algorithms are combined so that a pass div ersity effect is obtained without using training signals. The basic op erations of the proposed algorithm are as follows. CMA captures the di rect wave with maximum power. Based on the output of the CMA adaptive filter, a reference signal is generated. The LMS algorithm, using this reference signal, captures the delayed wave. By combining the direct wave and the delayed wave at maximum rate, the receiving quality is im proved. By means of a computer simulation, we confirmed that the conve rgence property is improved and that the effect of the reference signa l error on the system convergence characteristics is small. (C) 1998 S cripta Technica.