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.
|Original language||English (US)|
|Title of host publication||2016 IEEE 84th Vehicular Technology Conference (VTC-Fall)|
|Publisher||Institute of Electrical and Electronics Engineers (IEEE)|
|State||Published - Mar 20 2017|