An Improved Energy Detector for Mobile Cognitive Users Over Generalized Fading Channels
An Improved Energy Detector for Mobile Cognitive Users Over Generalized Fading Channels
复制标题
DOI：
10.1109/tcomm.2017.2754250
复制
发表时间：
2018-02
影响因子：
8.3
通讯作者：
Lokesh Gahane;P. Sharma;Neeraj Varshney;T. Tsiftsis;Preetam Kumar
中科院分区：
文献类型：
--
作者：
Lokesh Gahane;P. Sharma;Neeraj Varshney;T. Tsiftsis;Preetam Kumar
分析了一种改进的基于能量检测的频谱感知协作认知无线电网络(CRN)在不同衰落环境下的性能。考虑了广义多径(Nakagami-$m$)衰落和丰富多径(Nakagami-$q$)衰落模型，以及另外两个一般衰落分布，即$\kappa$-$\Mu$和$\eta$-$\Mu$。对于频谱感知，使用了基于任意功率p的改进能量检测器，而不是传统的基于功率2的检测方法。研究了认知用户移动性对改进能量检测器性能的影响。具体地说，在各种衰落环境下导出接收信号的统计量。根据虚警概率、漏检概率和接收机工作特性(ROC)曲线来评估所考虑的CRN系统的性能。此外，还得到了ROC曲线下的面积。给出了仿真结果，验证了本文的理论结果。
A cooperative cognitive radio network (CRN) with improved energy detection-based spectrum sensing is analyzed in various fading scenarios. Generalized multipath (Nakagami- $m$ ) fading and enriched multipath (Nakagami- $q$ ) fading models are considered along with two other general fading distributions, i.e., $\kappa$ - $\mu$ and $\eta$ - $\mu$ distributions. For spectrum sensing, instead of conventional power 2-based detection method, the arbitrary power $p$ -based improved energy detector is used. The impact of the cognitive user mobility on the performance of the improved energy detector is investigated. Specifically, the statistics for the received signal are derived over various fading environments. The performance of the considered CRN system is evaluated in terms of probability of false alarm, probability of missed detection, and receiver operating characteristics (ROC) curves. Moreover, the area under the ROC curve is also obtained. Simulation results are provided to corroborate the theoretical results derived in this paper.