• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>IEEE Transactions on Aerospace and Electronic Systems >Multistatic Detection for Passive Radar With Direct-Path Interference
【24h】

Multistatic Detection for Passive Radar With Direct-Path Interference

机译：具有直接路径干扰的无源雷达的多静态检测

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper examines the target detection problem in a multistatic passive radar with one noncooperative illuminator of opportunity (IO) and multiple distributed receivers. Specifically, we consider how to address the direct-path interference (DPI), which refers to the direct transmission from the IO to a receiver, to enhance passive detection performance. The DPI is in general much stronger (by many tens to even over a hundred dB) than the target echo. It is standard for a passive radar to apply some kind of interference cancellation by using, e.g., an adaptive array, to reduce the DPI. However, due to practical limitations of such techniques and the significant difference in strength between the DPI and target signal, the residual DPI after cancellation is often at a nonnegligible level. Unlike most existing passive detectors which ignore such residual DPI, we consider explicitly its effect and develop two new detectors under the conditions when the noise level is known and, respectively, when it is unknown. Another distinction from existing solutions is that the proposed detectors exploit the correlation of the IO waveform for passive detection. The proposed detectors are developed within the generalized likelihood ratio test (GLRT) framework, which involves nonlinear estimation that is solved using the expectation-maximization algorithm. Numerical results are presented to illustrate the performance of the proposed methods and several well-known passive detectors.
机译：本文研究了具有一个非合作机会照明器（IO）和多个分布式接收器的多静态无源雷达中的目标检测问题。具体来说，我们考虑如何解决直接路径干扰（DPI），这是指从IO到接收器的直接传输，以增强无源检测性能。通常，DPI比目标回波要强得多（几十个甚至超过一百个dB）。无源雷达的标准是通过使用例如自适应阵列来减少DPI来应用某种干扰消除。但是，由于此类技术的实际局限性以及DPI和目标信号之间强度的显着差异，消除后的残留DPI通常处于不可忽略的水平。与大多数现有的无源探测器忽略这种残留DPI的情况不同，我们明确考虑了其影响，并在已知噪声水平和未知噪声水平的条件下开发了两个新的检测器。与现有解决方案的另一个区别是，提出的检测器利用IO波形的相关性进行被动检测。提出的检测器是在广义似然比测试（GLRT）框架内开发的，该框架涉及使用期望最大化算法求解的非线性估计。数值结果表明了所提出的方法和几种众所周知的无源探测器的性能。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号