Patent ID: 7310538
Filing Date: 2007-12-18
Classification: H04B

Abstract:
1. A method comprising: collecting measurements of radio frequency signals received at different elements of an antenna system, the received signals corresponding to transmissions received from a system user and from at least one interfering user; collecting representations of the transmissions of the system user and the at least one interfering use; cross-correlating the collected measurements and the collected representations; and comparing the cross-correlation to the collected measurements to form a spatial characterization of the radio channel traversed by transmissions of the system user in which the elements of the spatial characterization represent forming a beam in the direction of the system user and directing nulls to the interfering user, wherein comparing comprises multiplying a matrix of the cross-correlation with a product of a matrix of the collected measurements to form a matrix in which the elements of the matrix characterize the radio channel traversed by transmissions of the system user.