多基地雷达中双门限CFAR检测算法

胡勤振; 苏洪涛; 周生华; 刘子威

doi:10.11999/JEIT151163

多基地雷达中双门限CFAR检测算法

doi: 10.11999/JEIT151163

基金项目:

国家自然科学基金(61372134, 61401329)

计量
- 文章访问数: 1673
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- 被引次数: 0
出版历程
- 收稿日期: 2015-10-21
- 修回日期: 2016-07-08
- 刊出日期: 2016-10-19

Double Threshold CFAR Detection for Multisite Radar

Funds:

The National Natural Science Foundation of China (61372134, 61401329)

摘要

摘要: 针对多基地雷达系统，该文为解决传统集中式检测算法数据传输率大的问题，根据广义似然比检测算法和自适应匹配滤波算法，提出两种双门限恒虚警率检测器：双门限广义似然比检测器和双门限自适应匹配滤波检测器。首先各个局部雷达站将超过第1门限的局部检验统计量传送到融合中心。然后融合中心根据局部雷达站传送的数据计算融合后的全局检验统计量，并与第2门限比较，得到最终的判决结果。在各空间分集通道的信杂噪比假设相同的条件下，给出了双门限自适应匹配滤波检测器的虚警概率和检测概率的解析表达式。仿真结果表明，两种双门限检测器在低数据率传输时能够保持较好的检测性能。
- 雷达 /
- 双门限检测 /
- 恒虚警率检测 /
- 广义似然比检测 /
- 自适应匹配滤波
Abstract: For multisite radar system, to solve the data transmission rate problem, two kinds of Double Threshold Constant False Alarm Rate (DT-CFAR) detectors, the DT Generalized Likelihood Ratio Test (DT-GLRT) detector and the DT Adaptive Matched Filter (DT-AMF) detector, are proposed based on the GLRT and the AMF algorithms. Fisrt, the local test statistics which exceed the first threshold are transferred to the fusion center. Then, the global test statistic is obtained from the local test statistics and the final decision is made compared to the second threshold in the fusion center. The closed form expression for probabilities of false alarm and detection of the DT-AMF detector are also given when the Signal to Clutter plus Noise Ratios (SCNRs) are identical in the spatial diversity channels. Simulation results illustrate that the DT-CFAR detectors can maintain a good performance with a low communication rate.
- Radar /
- Double hreshold detection /
- Constant False Alarm Rate (CFAR) /
- Generalized Likelihood Ratio Test (GLRT) /
- Adaptive Matched Filter (AMF)

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参考文献(19)

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