Cognitive radio (CR) technology is getting extensive attention to eliminate the problem of spectrum scarcity. This technology is based on Software Defined Radio (SDR) and some integrated intelligent functions such as spectrum sensing. This function is one of the crucial elements and its hardware implementation is important for the practical realization of the CR. This paper presents experimental results of the hardware implementation of the Goodness of Fit (GoF) based sensing for CR. Universal Software Radio Peripheral platform (USRP) is used for the experiments conducted. The choice of GoF based sensing for detecting spectrum holes is motivated by the advantage of requiring fewer samples to achieve the same sensing performance compared to Energy Detector (ED). Besides, the analytical expressions for the theoretical detection performance are derived. Computer simulations are carried out to evaluate the impact of fading channels on GoF based sensing. Numerical results confirm that the proposed GoF based sensing method outperform ED under fading channels. Furthermore, theoretical results of GoF based spectrum sensing are validated experimentally taking into account some parameters such as sample rate and sensing time. Finally, several scenarios of wideband GoF based sensing are considered to demonstrate the strengths of the considered method.

中文翻译：

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基于GoF的认知无线电频谱感知分析研究和SDR实现

认知无线电（CR）技术正受到广泛关注，以消除频谱稀缺的问题。该技术基于软件无线电（SDR）和一些集成的智能功能（例如频谱感应）。此功能是关键要素之一，其硬件实现对于CR的实际实现很重要。本文介绍了基于拟合优度（GoF）的CR传感硬件实现的实验结果。通用软件无线电外围平台（USRP）用于进行的实验。与能量探测器（ED）相比，基于GoF的传感技术来选择检测光谱孔的优势在于，需要更少的样品才能实现相同的传感性能。除了，推导了理论检测性能的解析表达式。进行计算机仿真以评估衰落通道对基于GoF的传感的影响。数值结果证实，在衰落信道下，基于GoF的感知方法优于ED。此外，考虑到一些参数（例如采样率和传感时间），通过实验验证了基于GoF的光谱传感的理论结果。最后，考虑了几种基于宽带GoF的传感方案，以证明所考虑方法的优势。考虑到一些参数（例如采样率和传感时间），通过实验验证了基于GoF的频谱传感的理论结果。最后，考虑了几种基于宽带GoF的传感方案，以证明所考虑方法的优势。考虑到一些参数（例如采样率和传感时间），通过实验验证了基于GoF的频谱传感的理论结果。最后，考虑了几种基于宽带GoF的传感方案，以证明所考虑方法的优势。