Location of interfering signal source in cognitive radio
XU Cheng-qian · Journal of Yanshan University · 2010
When cognitive users access the primary users' system,primary users would be interfered.Finding the cognitive users' location where interference generated is beneficial to deployment of base station,thereby avoiding the interferences and improving the spectrum efficiency.An improved MUSIC algorithm is proposed to locate coherent cognitive users in this paper.Take advantage of forward and backward spacesmooth modifiedmatrix,restructuringmatrix is obtained and decomposed.Beam space MUSIC algorithm is utilized to reduce the computation of peak search.Simulation results illustrate the efficiency of the new algorithm.