Patent attributes
There is provided mechanisms for selectively serving either one sector in an N sector system or two sectors in a 2·N sector system, where N≥1, using an antenna array comprising at least 4 antenna columns, where each antenna column comprising physical antenna elements. A method comprises generating at least one virtual antenna port pair per sector using the physical antenna elements. Each virtual antenna port in the at least one virtual antenna port pair is obtained by combining physical antenna elements having orthogonal polarization such that two virtual antenna ports in each virtual antenna port pair have identical power radiation patterns and orthogonal polarizations, and at least one antenna element per polarization has a non-zero weight. The method comprises transmitting signals using the at least one virtual antenna port pair per sector in one sector in the N sector system or in two sectors in the 2·N sector system.
