基于GNU Radio和USRP的宽频带并行感知平台设计

Wideband spectrum sensing based on GNU radio and USRP

针对当前宽带频谱感知机制在感知精度和感知效率方面的不足,提出了一种基于滤波器组的宽频带并行感知方法,通过将多个相邻子带灵活组合实现非等带宽信道的频谱感知,对多个子带进行并行检测实现对宽带频谱的高效感知。同时,利用GNU Radio和USRP软件无线电构建了宽频带感知平台,验证了该感知方法的性能和有效性。实验结果表明,该感知平台能够在较低SNR和较少感知时间的情况下获得更高的感知性能,适用于非等带宽多信道频谱感知。

To enhance the performance on sensing accuracy and sensing efficiency of current wideband sensing mechanisms, this paper exploited a wideband spectrum sensing method based on filter bank. By flexibly assembling of multiple adjacent subbands, it achieved the non-uniform wideband spectrum sensing. By parallel detecting of multi sub-bands, it obtained the high sensing efficiency of wideband spectrum. Based on GNU Radio and universal software radio peripheral, verified the perform- ance and effectiveness of sensing approach through the experimental platform. Results show that the proposed wideband sensing method outperforms the traditional energy detector and increases the sensing efficiency under lower SNR and with less sensing time, and is suitable for non-uniform multi-channel spectrum sensing.