引用本文: | 彭岁阳,张军,沈振康.随机频率步进雷达成像分析[J].国防科技大学学报,2011,33(1):59-64.[点击复制] |
PENG Suiyang,ZHANG Jun,SHEN Zhenkang.Imaging Analysis of Random Step Frequency Radar[J].Journal of National University of Defense Technology,2011,33(1):59-64[点击复制] |
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随机频率步进雷达成像分析 |
彭岁阳, 张军, 沈振康 |
(国防科技大学 电子科学与工程学院ATR实验室,湖南 长沙 410073)
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摘要: |
随机频率步进信号兼具步进频率雷达和宽带噪声雷达的特点,不仅可以降低系统瞬时带宽和数据采样率,还具有优良的低截获概率(LPI)、电磁兼容性(EMC)和抗射频干扰(ARFI)特性。分析了随机频率步进信号的相关输出及模糊函数的统计特性,如一阶矩、二阶矩和方差等,并与均匀频率步进信号做了抗干扰性能的比较。提出并分析了相关输出结合Range-Doppler模式的SAR成像方法,同时通过仿真实验验证了该方法成像的有效性。 |
关键词: 随机频率步进信号 相关输出 模糊函数 抗干扰 距离多普勒算法 |
DOI: |
投稿日期:2010-01-16 |
基金项目:国家部委基金项目(9140A01060307KG01) |
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Imaging Analysis of Random Step Frequency Radar |
PENG Suiyang, ZHANG Jun, SHEN Zhenkang |
(ATR Laboratory,National Univ. of Defense Technology,Changsha 410073,China)
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Abstract: |
The random step frequency signal shares the characteristics of the step frequency radar and the wideband noise radar. It not only reduces the instantaneous band-width and data sampling rate, but also has the good characteristics of the low probability of intercept, the electromagnetic compatibility and the radio-frequency immunity. The statistic characteristics of correlation output and ambiguity function like first moment,second moment, and variance were analyzed, and the radio-frequency immunity of the random step frequency signal was compared with linear stepped frequency signal in this paper. The SAR imaging algorithm based on the Correlation-Output and Range-Doppler algorithm was presented and analyzed, and the simulation result verified the validity. |
Keywords: random step frequency signal correlation output ambiguity function radio-frequency immunity range-doppler algorithm |
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