| 侦察信号互相关滤波的信噪比分析 |
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| 引用本文： | 俞静一,;赵国庆,;沈志博.侦察信号互相关滤波的信噪比分析[J].中国电子科学研究院学报,2014(2):169-173. |
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| 作者姓名： | 俞静一 ;赵国庆 ;沈志博 |
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| 作者单位： | [1]中国洛阳电子装备试验中心,河南洛阳471003; [2]西安电子科技大学电子信息攻防对抗与仿真技术教育部重点实验室,西安710071 |
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| 基金项目： | 中央高校基本科研业务专项资金（K5051202026） |
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| 摘 要： | 低截获概率（LPI）雷达的出现导致无源探测系统难以从噪声中检测到威胁信号,针对无源探测系统的信号检测问题,提出了一种基于互相关滤波的信号检测方法,利用高信噪比的辐射源样本与辐射源信号的重复性,进行互相关滤波处理,有效提高了检测性能。分析了脉压比、输入信噪比、样本信噪比,及时间同步误差、多普勒频率差对检测性能的影响。仿真分析证明了方法的正确性与有效性。
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| 关 键 词： | 无源探测 截获概率 信号样本 互相关滤波 |
The SNR Analysis of Cross-correlation Filter for Reconnaissance Signal |
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| Affiliation: | YU Jing-yi , ZHAO Guo-qing, SHEN Zhi-bo (1. Electronic Equipment Test Center, Henan Luoyang 471003, China; 2. Key Laboratory of Electronic Information Countermeasure and Simulation, Ministry of Education, Xidian Univ Xi＇ an 710071 ,China) |
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| Abstract: | The appearance of low probability of intercept（ LPI） radar leads to the difficulty to detect threatening signal from noise. Aiming at the signal detection problems of passive detection system,a signal detection method based on cross-correlation filter is proposed. With the repeatability of high SNR emitter sample and emitter signal,it improves the detection performance with the cross-correlation filter processing. The influence of pulse compression,input SNR,sample SNR,time synchronization error and doppler-shifted frequencies for the detection performance are analyzed. The simulation results verify the effectiveness and correctness of this method. |
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| Keywords: | passive detection intercept probability signal sample cross-correlation filter |
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