Antenna selection for opportunistic interference management in MIMO broadcast channels
Lemonia Dritsoula, Zheng Wang, Hamid R. Sadjadpour, Jose Joaquin Garcia-Luna-Aceves · 2010
Opportunistic interference management (OIM) is an approach that can asymptotically achieve dirty paper coding (DPC) capacity in the downlink of wireless cellular networks with minimum feedback requirement. With K antennas at the base station and M mobile users in the cell, the proposed technique requires only K integer numbers related to channel state information (CSI). This multiplexing gain of K is achieved at the expense of M mobile users such that K = Θ(log M). We introduce an antenna selection scheme at the base station to reduce the minimum number of required mobile users significantly at the expense of reasonable increase in feedback.