摘要
为了在有恶意节点的情况下提高频谱的检测概率,并用更少的样本数来达到判决门限,提出一种基于正确判断能力的改进加权序贯频谱检测算法。该方法通过节点的正确判断能力对各个节点的似然比加权一个更优的系数,能够识别恶意节点并且利用恶意节点发送的数据。仿真结果表明,新算法能够在较少样本数的情况下获取较高的检测概率。
In order to improve the detection probability and to achieve the decision threshold with fewer samples while there are malicious nodes, a modified weighted sequential probability ratio test based on the nodes ability of correct decision is proposed, with which, a better weighted coefficient based on ability of correct decision can be optimized, thus, the malicious nodes can be found and the date transmitted by them can be practiced upon. Simulation results show that, with fewer samples, the proposed method obtains a higher detection probability than the original algorithm.
出处
《西安邮电学院学报》
2011年第5期26-30,共5页
Journal of Xi'an Institute of Posts and Telecommunications
关键词
加权序贯检测
信任度
恶意节点
weighted sequential probability ratio test （WSPRT）
credibility
malicious nodes
