Patent ID: 8149895
Filing Date: 2012-04-03
Classification: H01Q,H04B,H04J,H04W

Abstract:
1. Apparatus for wireless communication with at least two mobile units using a null beam steering technique, comprising: first and second data sources each having data intended for a different one of said mobile units; first and second units for respectively spreading input data from said first and second data sources, each employing a spreading code for spreading their associated input data, said spreading code being one of a same spreading code or a correlated spreading code; first and second groups of complex weighting values respectively associated with said first and second data sources, each group of complex weighting values being respectively supplied to inputs of first and second groups of circuits, each of said first and second groups of circuits respectively receiving an output of said first and second units, for multiplying each received output responsive to an associated complex weighting value input; an antenna array comprising a given number of antennas which is greater than a number of data sources; and a third group of circuits each combining an output of one of said circuits in said first group with an associated one of said circuits of said second group and delivering an output of each circuit of said third group to an associated one of said antennas in said array, said antennas being arranged to limit the mobile units to receipt of data from only one of said data sources.