A Survey of Spectrum Sensing Algorithms The spectrum sensing problem has gained new aspects with cognitive radio and opportunistic spectrum access concepts. It is one of the most challenging issues in cognitive radio systems. In this paper, a survey

IN THIS PAPER, THE PERFORMANCE OF A COGNITIVE RADIO (CR) CDMA NETWORKS IS ANALYZED IN UPLINK. MORE PRECISELY, WE DEVELOP A SIMULATION TESTBED FOR ANALYZING PERFORMANCES OF A CR USER AND A PRIMARY USER (PU) IN A SINGLE CELL.