Spectrum sensing with integration of energy detector and diversity techniques for MIMO systems

Spectrum sensing is a key enabling cognitive radio networks, which increases the opportunity of spectrum access to cognitive radio users, by avoiding interference with the operation of the primary network (licensed network). In literature many research conducted cognitive radio networks with SISO systems. However, the trend of MIMO users should be taken into account. In fact, the use of spectrum sensing for SISO system can be applied to MIMO system but it is not yet effective enough to limit the interference to the primary users by cognitive radio MIMO users. Thus, in order to improve and use the cognitive radio network for MIMO users, this paper has presented the integration of energy detector and diversity techniques for MIMO systems, which can increase the efficiency of spectrum sensing. The simulation results show that the proposed technique can reduce the probability of false alarms and increase the probability of detection.