Abstract
Conference Title: 2016 IEEE 84th Vehicular Technology Conference (VTC-Fall) Conference Start Date: 2016, Sept. 18 Conference End Date: 2016, Sept. 21 Conference Location: Montreal, QC, Canada We present a transmit antenna subset selection scheme for an underlay cognitive system serving multiple secondary receivers. The secondary system employs zero-forcing beamforming to nullify the interference to multiple primary users and eliminate inter-user interference to the secondary users simultaneously. Simulation results show that the proposed scheme achieves near-optimal performance with low computational complexity. Lastly, an optimal power allocation strategy is also introduced to improve the secondary network throughput.