A CMA Adaptive Array with Digital Phase Shifters Controlled by a Genetic Algorithm

Abstract

In this paper, we consider CMA adaptive arrays with digital phase shifters controlled by a genetic algorithm(GA). As an example, a 4-element circular array is considered. The element is a 50 ohm loaded dipole antenna. It is assumed that a π/4-shift-QPSK-modulated plane wave desired and undesired signal are incident from a horizontal plane directions. The received signal at each receiving antenna element is calculated by the method of moments where mutual coupling effects are taken into account, and is used as an input of the CMA adaptive processor and undesired signal rejection characteristics by GA are investigated.