| 陈韶华,赵冬艳,郑伟.水下运动声源的方位方差检测方法[J].,2015,34(1):65-70 |
| 水下运动声源的方位方差检测方法 |
| Bearing variance detection method for underwater moving sound source |
| 投稿时间：2014-04-09 修订日期：2014-12-25 |
| 中文摘要: |
| 利用水下目标辐射信号与海洋环境噪声在空间分布特性上的差异,提出了一种检测前估计方法,以提高对水下运动目标的检测能力。该方法采用时延估计法估计目标方位,对方位求方差以获得检验统计量。采用奈曼-皮尔逊准则,推导了该方法的检测概率关系式,得出了接收机工作特性曲线,并与宽带能量检测方法进行了比较,表明该方法的性能远优于宽带能量检测方法。理论分析和海上试验结果都验证了该方法的有效性。 |
| 英文摘要: |
| Taking advantage of the difference in spatial distribution between underwater target and ocean ambient noise, an estimate before detect method is proposed to improve the weak signal detection capability for underwater moving target. The time delay estimation method is applied to estimate the bearing of the target, resulting the test statistics by resolving the variance of the bearings. The receiver operating characteristics (ROC) of this detector is derived based on the Neyman-Pearson criterion. The results show that its performance is far superior to the widely used broadband energy detector. Both theoretical analysis and results in sea trials show the effectiveness of our method. |
| DOI：10.11684/j.issn.1000-310X.2015.01.010 |
| 中文关键词: 水声探测,检测前估计,宽带能量检测 |
| 英文关键词: underwater acoustic detection, estimate before detect, broadband energy detector |
| 基金项目: |
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