西安电子科技大学学报（自然科学版）2016，Vol.43Issue(4)：57-62,6.DOI:10.3969/j.issn.1001-2400.2016.04.011
粗糙目标光外差信号特性对探测阈值的影响
Effect of properties from a rough target echo signal on the detection threshold in optical heterodyne detection
摘要
Abstract
Traditionally , a simple model , such as Gaussian distribution , describes the optical heterodyne detection echo signal of the target , which often leads to judgment errors . In this paper , we present a more accurate method to describe the probability distribution of the echo signal by use of polynomial fitting . The echo signals from a surface coating specimen of an armored car are measured , with the statistical analysis showing that the probability of detection is higher and the probability of false alarm is lower , when using the method of polynomial fitting to determine the decision threshold , rather than using a simple Gaussian distribution to determine it . The results show that by the method of polynomial fitting on the statistical histogram of the measured intermediate frequency signal , the precision of setting the detection threshold will be improved , and that the probability of detection rises by 6.02% and the probability of false alarm falls by 7.7% . The results of this paper provide a quantitative reference for designing the rough surface echo heterodyne detection system and also provide a useful tool for evaluating the performance of the heterodyne detection system .关键词
光外差探测/统计特性/高斯分布/探测阈值/检测概率/误警概率Key words
optical heterodyne detection/statistical properties/Gaussian distribution/detection threshold/probability of detection/probability of false alarm分类
信息技术与安全科学引用本文复制引用
党文佳,曾晓东,来志,冯喆珺,曹长庆,霍燿炜..粗糙目标光外差信号特性对探测阈值的影响[J].西安电子科技大学学报（自然科学版）,2016,43(4):57-62,6.基金项目
国家自然科学基金资助项目 （）
