An efficient power allocation method based on limited sensing area of secondary user and mixed protection measures of primary user
Yuehuai Ma · Journal of Circuits and Systems · 2013
In this paper,an efficient power allocation method based on limited sensing area of secondary user and mixed protection measures of primary user is studied.Considering the subchannel occupancy probability of primary users,the authors found the multi-area model of cognitive system and propose the mixed interference avoidance principle of different situations.Based on the objective of maximizing the transmission rate of cognitive system,a low complexity method which jointly optimizes the sum power of different subchannel sets and the power inside each subchannel set is developed.Simulation results show that joint optimizing method can achieve great rate performance with different parameter settings and beyond the maximum rate achieved by the opportunistic spectrum access mode.