摘要
在实际检测中,从本地检测器至融合中心的无线信道通常无法保证为理想传输信道,于是传统的基于理想信道的优化检测算法要做相应调整。基于非理想信道该文研究了一种次优检测算法,应用聂曼-皮尔逊(NP)规则推导出各节点的判决形式,根据概率知识求出各节点的虚警概率和检测概率,然后用迭代的方法得到虚警概率在一定范围内系统检测概率最大时各个节点的检测门限。最后通过仿真说明了信道的非理想性确实影响了系统的检测性能。
In the actual detection, the wireless channels from the local detectors to fusion center usually can＇t be the ideal channel, so the traditional optimal detection arithmetic based on the ideal channel is rectified accordingly. In this paper, a suboptimal detection arithmetic is studied based on non-ideal channel, using Neyman-Pearson （NP） rule the decision forms of every node are derived, according to the probability theory knowledge, the false alarm probability and the detection probability of every node are obtained, in order to maximize the detection probability restricted a constant of the false alarm probability, the iterative arithmetic is applied to find the detective threshold of every node. Finally the smulation shows that the non-ideal channel affect the detection performance of system surely.
出处
《电子与信息学报》
EI
CSCD
北大核心
2008年第11期2650-2653,共4页
Journal of Electronics & Information Technology
关键词
无线信道
似然比检测
最优化检测
Wireless channel
Likelihood ratio test
The optimal detection
