Patent ID: 7519395
Filing Date: 2009-04-14
Classification: H01Q,H04B

Abstract:
1. A base station for use in canceling interference from at least one known interference source, the base station comprising: a main antenna for receiving signals from a plurality of remote users; at least one directional antenna, directed independent of said main antenna, toward said at least one interference source, said directional antenna having a plurality of coplanar feeds that are located one quarter to one half wavelength apart from each other, each coplanar feed for receiving an RF signal; a weighting unit for weighting said RF signals received by said plurality of coplanar feeds to produce a cancellation signal; a first summer for summing said weighted signals using a least mean square (LMS) algorithm; and a second summer for summing said cancellation signal with signals received from said main antenna to produce an output signal substantially free from interference.