| 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 |
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(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 |
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(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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