摘要
提出一种改进的干扰检测算法,在自适应门限的基础上增加一个干扰门限,对调制重叠变换后的数据进行双门限干扰检测。研究结果表明:该算法可有效克服自适应门限算法和传统双门限算法对高信噪比敏感的缺陷,在保证低信噪比条件下较高的干扰检测概率的同时,有效降低高信噪比、无干扰下的干扰误检概率,以及高信噪比、小干扰的检测概率。本文所提检测算法在大信噪比范围均保持良好的干扰检测性能。
A novel interference detection algorithm based on adaptive threshold was proposed, in which the MLT （Modulation Lapped Transformation） data were used to perform interference detection processing based on double thresholds. The results show that proposed algorithm has better performance of interference detection processing, especially at high SNRs, than the other two algorithms, adaptive threshold algorithm and the traditional double-threshold algorithm. The proposed algorithm can reduce the false detection probability without interference and the detection probability of small interference at high SNRs while ensuring the detection probability of interference at low SNRs. The algorithm shows good performance of interference detection at a wide range of SNRs.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2015年第11期4114-4121,共8页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(61501376)
陕西省自然科学基础研究计划项目(2014JM2-6094)
西北工业大学研究生创意创新种子基金资助项目(Z2015106)~~
关键词
直扩系统
重叠变换
门限
干扰检测
direct spread spectrum system
modulated lapped transform
threshold
interference detection
