Patent ID: 6747584
Filing Date: 2004-06-08
Classification: G10K,H01Q,H04B

Abstract:
A method of creating a virtual beam in a target beam direction from analog signal components associated with an array of input elements, the method comprising the steps of:establishing a set of indices defining a random sequence having specific statistical properties, said random sequence determining a sequencing order for said analog signal components; establishing a set of associated time delay indices based on said sequencing order and said target beam direction, over-sampling said analog signal components to provide a set of sampled digital signal components in said sequencing order; establishing a time alignment between said digital signal components based on said time delay indices, said time alignment providing coherent reinforcement of the analog signal components in said target beam direction; and down-filtering said time aligned digital signal components to select a specific signal frequency band and eliminate noise outside said specific signal frequency band.