Optimization Scheme of Average Time for Finding Idle Channel in Cognitive Radio System

Abstract

Abstract: In cognitive radio system, periodic spectrum sensing was taken by secondary users to prevent the interference to primary users. Supposed that there are many primary user channels, when the current primary user occupies channel, secondary users do spectrum handover. During spectrum handover, the time of finding an idle channel is a random variable. In order to speed up spectrum handover, the system used equal gain combining cooperative spectrum sensing to inspect an idle channel. This pattern optimized the sensing time of the single user channel, in order to get the best effect of the average time in finding idle channel. Using different simulation parameters, there are accordingly optimal sensing times of the single channel, and the corresponding different shortest average time of finding idle channel.

Key words: cognitive radio, spectrum sensing, spectrum handover, soft combination, optimization

CLC Number:

TN911.23

Qiao Pei, Xiao Liyuan, Han Yanyan, Gao Ling. Optimization Scheme of Average Time for Finding Idle Channel in Cognitive Radio System[J]. Journal of System Simulation, 2016, 28(3): 727-732.

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