| 利用调频率匹配的DRFM欺骗干扰检测方法 |
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| 引用本文： | 卢云龙,李明,闫琰.利用调频率匹配的DRFM欺骗干扰检测方法[J].西安电子科技大学学报,2014,41(5):67-73+134. |
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| 作者姓名： | 卢云龙 李明 闫琰 |
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| 作者单位： | (西安电子科技大学 雷达信号处理国家重点实验室，陕西 西安710071) |
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| 基金项目： | 国家部委预研基金资助项目(9140A07020913DZ01001)；博士学科点科研专项基金资助项目(20110203110001)；航空科学基金资助项目(20110181006) |
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| 摘 要： | 针对转发式线性调频(LFM)有源欺骗干扰的检测问题，提出了基于干扰信号谐波分量调频率匹配的检测方法．数字射频存储器存在谐波效应特性，该方法通过分析干扰信号的频谱特征规律，建立谐波分量调频率参数库．在雷达距离门内同时存在目标回波和干扰信号的情形下，利用分数阶傅里叶变换检测雷达回波中LFM信号分量并估计其调频率，通过与参数库进行匹配分析，实现干扰信号的检测．仿真结果验证了该方法的有效性．
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| 关 键 词： | 数字射频存储器量化 有源欺骗干扰 分数阶傅里叶变换 参数估计 |
| 收稿时间： | 2013-05-21 |
Method for detecting DRFM deception jamming based on LFM rate matching |
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| LU Yunlong,LI Ming,YAN Yan.Method for detecting DRFM deception jamming based on LFM rate matching[J].Journal of Xidian University,2014,41(5):67-73+134. |
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| Authors: | LU Yunlong LI Ming YAN Yan |
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| Affiliation: | (National Key Lab. of Radar Signal Processing, Xidian Univ., Xi'an 710071, China) |
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| Abstract: | For detecting linear frequency modulated (LFM) active deception jamming, a novel approach is outlined based on LFM rate matching of the jamming harmonic components. Utilizing the harmonic effect generated from a digital radio frequency memory (DRFM), the feature of the harmonic spectrum is analyzed and an LFM rate base of the jamming is established first. Then the Fractional Fourier Transform (FrFT) is employed to detect LFM components in the radar echo when both the target echo and the jamming signal are co-existent in a range gate. After that the LFM rates of the detected LFM signal are estimated and compared with the LFM rate bank to achieve jamming detection. Validity of the method is verified by simulation results. |
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| Keywords: | DRFM quantization active deceptive jamming FrFT parameter estimate |
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