| 提高多普勒雷达测速估计精度的方法 |
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| 引用本文： | 蔡征宇,陈文武,谢仁宏. 提高多普勒雷达测速估计精度的方法[J]. 南京理工大学学报(自然科学版), 2009, 33(4) |
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| 作者姓名： | 蔡征宇 陈文武 谢仁宏 |
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| 作者单位： | 南京理工大学电子工程与光电技术学院,江苏,南京,210094 |
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| 摘 要： | 针对连续波多普勒雷达外弹道测速的特点,为了解决频率分辨率与采样频率影响多普勒雷达速度测量精度的问题,提出应用快速傅里叶变换的频谱分析法.该方法基于目标弹道升、降规律对估计频率进行线性调整,能有效提高多普勒雷达的作用距离、测试精度和抗干扰能力,避免由于频率分辨率不够而出现连续相同的速度值.利用信号相邻两次截断后的频谱相位信息能提高频率估计精度.仿真结果和外场试验表明该方法在较低信噪比下,仍可以得到很高的频率估计精度.
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| 关 键 词： | 多普勒雷达 快速傅里叶变换 频率估计 线性调整 |
Estimation Precision Improvement Method of Velocity Measurement for Doppler Radar |
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| CAI Zheng-yu,CHEN Wen-wu,XIE Ren-hong. Estimation Precision Improvement Method of Velocity Measurement for Doppler Radar[J]. Journal of Nanjing University of Science and Technology(Nature Science), 2009, 33(4) |
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| Authors: | CAI Zheng-yu CHEN Wen-wu XIE Ren-hong |
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| Affiliation: | School of Electronic Engineering and Optoelectronic Technology;NUST;Nanjing 210094;China |
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| Abstract: | According to the feature of exterior ballistic velocity measurement for continuous wave Doppler radar,in order to solve the problem that the frequency resolution and the sampling frequency may bring negative effects on the velocity measurement precision,frequency spectrum analysis based on fast Fourier transform is used.A linear adjustment method of frequency estimation is proposed according to the ascending or descending principle of target exterior trajectory.The method improves the measuring distance and... |
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| Keywords: | Doppler radar fast Fourier transform frequency estimation linear adjustment |
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