雷达波形隐身性能的综合隐身测度设计
南京理工大学, 电子工程与光电技术学院, 江苏南京 210094
| 摘 要： | 隐身测度是衡量雷达信号隐身能力的关键性指标，然而目前的雷达信号隐身测度大多是单一性评估指标，难以综合地评价雷达信号隐身能力，基于此，本文在前人LPI评估因子、相对熵和截获因子的基础上，改进评估因子，消除其中对功率谱分布无影响的因素，构建新的谱分布因子，利用理想LPI信号的谱分布因子归一化谱分布因子；简化相对熵的最终计算公式，降低对计算过程的依赖，仅依靠积分变换后随机变量经验分布函数的首尾即可计算出相对熵；重新梳理截获因子，从中提取影响雷达信号隐身性能的功率、时宽、带宽等因素。采用等权乘积的方式，将上述3个隐身评估指标构造成新的综合隐身测度。利用综合隐身测度对常见LPI雷达信号进行仿真，通过仿真分析证明了综合隐身测度的有效性。 |
| 关 键 词： | 谱分布因子; 相对熵; 截获因子; 综合隐身测度 |
| DOI： | 10.57237/j.se.2023.01.002 |
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收稿日期: 2022-12-06
接受日期: 2023-01-13
在线出版日期: 2023-02-03
Design of Integrated Stealth Measure for Radar Waveform Stealth Performance
School of Electronic and Optical Engineering, Nanjing University of Science and Technology, Nanjing 210094, China
| Abstract: | Stealth measure is a key index to measure radar signal stealth capability. However, current radar signal stealth measure is mostly a single evaluation index, which is difficult to comprehensively evaluate radar signal stealth capability. Based on this, this paper improves the evaluation factor on the basis of previous LPI evaluation factor, relative entropy and interception factor, and eliminates the factors that have no influence on the power spectrum distribution. A new spectral distribution factor is constructed and the spectral distribution factor of ideal LPI signal is used to normalize the spectral distribution factor. The final calculation formula of relative entropy is simplified to reduce the dependence on the calculation process. The relative entropy can be calculated only by the beginning and end of the empirical distribution function of random variable after integral transformation. The interception factors are sorted out again to extract the power, time width, bandwidth and other factors that affect the stealth performance of radar signal. A new comprehensive stealth measure was constructed from the above three stealth evaluation indexes by means of equal weight product. The comprehensive stealth measure is used to simulate common LPI radar signals, and the effectiveness of the comprehensive stealth measure is proved by simulation analysis. |
| Keywords: | Spectral Distribution Factor; Relative Entropy; Interception Factor; Comprehensive Stealth Measure |
基金
| 1. | 国家自然科学基金面上项目《时-空联合压缩感知3D超分辨雷达成像机理研究》(61271331) |
| 2. | 国家自然科学基金国际合作项目《基于类DNA结构人工电磁材料的电磁波相位调控机理研究》 (62211530440). |
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