基于频谱空隙利用率的频谱感知时间优化

Spectrum sensing time optimization problem based on the USOP

频谱感知是认知无线电中最基础的技术之一,频谱空隙利用率(USOP)是评价认知用户实际感知性能的重要指标.分析了影响USOP的因素,证明了存在最优的感知时间可以使USOP达到最大,并且在传输速率为100 kb/s,数据包大小为500 bits,虚警概率为0.9,检测概率为0.9的条件下,得到最优频谱感知时间约为2 ms.

Spectrum sensing is one of the most basic technology of cognitive radio. Utilization of spectrum opportunity （ USOP） is an important index of actual perception performance evaluation of the cognitive users. We analyses several factors that influence USOP,and proves the existence of optimal time perception which maximize USOP. When the transmission rate is 100 kb/s, the packet size is 500 bits, the false-alarm probability is 0. 9, and the detection probability is 0. 9, the calculated optimal spectrum perception of time is about 2 ms.