基于数据融合的协作频谱感知方法研究毕业设计

基于数据融合的协作频谱感知方法讨论摘要：认知无线电(Cognitive Radio，CR)是无线通信领域中为改善和提高频谱资源利用率而提出的一种新方法。它作为一种革命性的智能频谱共享技术，已成为无线通信领域新的讨论热点。频谱感知技术是认知无线电最关键的技术之一。基于此，本文以单用户能量检测方法为基础，对检测概率、漏检概率、虚警概率、门限值、信噪比等参数进行了仿真分析，并对其检测性能进行了分析。针对于单用户能量检测受到信道衰落、阴影效应和噪声不确定性等因素的影响产生检测性能下降的情况，提出了数据融合的协作频谱感知方法，如与准则、或准则、K-N 准则，并分析了不同融合方法的特点、性能及使用场景。关键词：认知无线电；频谱感知；数据融合；协作检测Research of Cooperative Spectrum Sensing Based on Data FusionAbstract: To improve and enhance the utilization of the spectrum resource in the field of the wireless communication ， cognitive radio technology has been proposed as a new method ． As a revolutionary intelligence technology ， cognitive radio is becoming a hot research topic in the field of the wireless communication ．Spectrum sensing technology is one of the most critical technologies in cognitive radio ．Thus，this paper is based on the energy detection method in a sigle user ． Meanwhile ， this paper simulates and analyses some parameters such as the prob ability of detection，the probability of undetected，false alarm probability ， threshold ， SNR and so on ． Besides ， its detection performance is analyzed.Due to fading channel ， shadowing effection ， noise uncertains and other factors，the decline in detection performance happened，and cooperative spectrum sensing data fusion methods have been proposed，such as AND guidelines，OR guidelines，K-N guidelines ． Lastly ， this paper analyses the characteristics of the different fusion methods，performance and usage scenarios.Keywords: cognitive radio;spectrum ...