文章摘要
马艳,李志舜.不同干扰强度下三种鱼雷自导检测器的性能[J].声学技术,2003,(2):95~97,112
不同干扰强度下三种鱼雷自导检测器的性能
Detection performance of three detectors of torpedo-homing under interference of different strengths
投稿时间:2001-09-03  修订日期:2002-03-15
DOI:
中文关键词: 畸变信道  相关器  积分器  检测性能  自适应门限
英文关键词: distortion channel  correlation detector  integration processor  detection performance  adaptive threshold
基金项目:
作者单位
马艳 西北工业大学航海工程学院, 710072 
李志舜 西北工业大学航海工程学院, 710072 
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中文摘要:
      副本相关器、副本相关积分器和分段副本相关器分别是理想信道、时间扩展信道和频率扩展信道(又称快速衰落信道)中的最佳似然比检测器。针对这三种检测器在背景干扰功率变化的应用情况,推导了背景干扰功率为σ2时检验统计量的分布,在此基础上,依据奈曼-皮尔逊准则,可确定此时强度背景下的检测门限,并进一步确定其检测概率,最后将理论的结果与Monte-Carlo实验进行了比较,结果与推导的一致。
英文摘要:
      Replica correlation detector, replica correlation integration processor and segmented replica correlation detector are optimum LR detectors for ideal channels, time spreading distortion channels and fast fading distortion channels, respectively. The distribution of test statistic is derived for the interference power σ2. Based on the results, a detection threshold is determined according to Neyman-Pearson's rule. The detection probability is also obtained. The result is compared with that of a Monte-Carlo experiment. Simulated and analytical results are in good agreement.
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