频谱用户行为特征建模与分析

Research on Modeling of Spectrum Behavior Characteristics

针对频谱用户行为特征建模问题,在测量0～400 MHz、750～1050 MHz和2.3～2.5 GHz三个代表性频段的基础上,计算各频段的频谱图和频谱占用情况,指导认知无线电寻找合适的频谱以使用。通过拟合频谱测算数据可知:用户到达信道速率服从泊松分布,用户到达间隔概率服从负指数分布。研究结果可为认知无线电的频谱接入等算法提供理论支撑。

In regard to modeling of spectrum behavior characteristics,the three representative frequency bands of 0-400 MHz,750-1050 MHz and 2.3-2.5 GHz are measured,then the time-frequency diagram and the spectrum occupancy are calculated,so the cognitive radio is guided to get suitable spectrum.By fitting the spectrum measurement data,the arrival rate probability obeys the Poisson distribution,and the arrival interval probability obeys the negative exponential distribution,which provides theoretical support for the spectrum access algorithm of cognitive radio.