Abstract:

Smart antenna and power control are combined to reduce interference and error rate and to improve the performance of the system.The signal is beamformed through smart antenna, utilizing game theory to realize power control of the transmiter.Considering the influence of the power level strategy from other users, power iteration is used to improve the transmission power. Compared to only using power control, it can improve the SINR(Signal to Interference Ratio), throughput, sending power etc.and the simulation results show its advantagement.

Key words: cognitive radio, smart antenna, signal to interference ratio(SINR), power control, game theory