Beamforming in underlay cognitive radio: Null-shaping constraints and greedy user selection
Eduard Axel Jorswieck, Rami Mochaourab · 2010
In a multiuser cognitive radio setting, multiple secondary systems coexist with multiple primary systems. We assume the secondary systems consist of transmitter-receiver pairs, and each transmitter is equipped with multiple antennas while all receivers use a single antenna. In this setting, the seco