Cooperative Spectrum Sensing in Cognitive Radio Systems

We considered the problem of use the reliability of unlicensed users for cooperative spectrum sensing in cognitive radio systems by analyzing the Huffman encoding algorithm. We present a novel cooperative spectrum sensing algorithm in cognitive radio systems. We drive the close-form expressions for the average sending bits for each unlicensed user for cooperation and expression for the probability of the detection and the false-alarm for the novel cooperative spectrum sensing scheme. Finally, we show through numerical results the potential cooperative spectrum sensing performance improvement with using the reliability of unlicensed users.