SPECTRUM SENSING IN COGNITIVE RADIO WITH FIREFLY OPTIMIZATION A METAHEURISTIC APPROACH

Spectrum sensing is characterized as the errand of finding of spectrum holes by sensing the radio spectrum in the nearby neighbourhood of the cognitive radio recipient in unsupervised way. The spectrum holes remains for those sub bands of the radio spectrum that are underutilized at specific moment of time and particular geographic area. Spectrum Sensing is the capacity to decide and sense whether permit user is available or missing. In spectrum sensing increase the false rate. IN optimization of spectrum sensing by firefly optimization reduce the error rate in threshold by 10^-7 .In comparison of  PSO Firefly significant improve error, throughput.