| 基于运动物体高阶多普勒效应的横向速度估计 |
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| 引用本文： | 张兴敢,柏业超.基于运动物体高阶多普勒效应的横向速度估计[J].南京航空航天大学学报(英文版),2009,26(3). |
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| 作者姓名： | 张兴敢 柏业超 |
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| 作者单位： | 南京大学电子科学与工程系,南京,210093,中国 |
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| 基金项目： | 毫米波国家重点实验室开放课题(K200819)资助项目. Foundation item: Supported by the State Key Laboratory of Millimeter Waves |
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| 摘 要： | 目标与雷达存在相对径向运动时回波相位一次项发生变化,产生多普勒效应.多普勒效应广泛用于雷达信号处理.目标横向运动分量不会导致回波相位一次项变化,但会导致回波相位高次项的变化,据此本文提出横向运动物体的高阶多普勒效应及其横向速度的计算方法.高阶多普勒效应与常规多普勒效应配合可以计算任意向平稳运动物体的标量速度.文中给出了计算方法和仿真结果.当目标横向运动速度为900 km/h,且回波信号信噪比大于0 dB时,计算误差小于0.06 %.
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| 关 键 词： | 多普勒效应 曲线拟合 横向运动 相位差分 |
TRANSVERSE VELOCITY ESTIMATION BASED ON HIGH-ORDER DOPPLER EFFECT OF MOVING OBJECT |
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| Zhang Xinggan,Bai Yechao.TRANSVERSE VELOCITY ESTIMATION BASED ON HIGH-ORDER DOPPLER EFFECT OF MOVING OBJECT[J].Transactions of Nanjing University of Aeronautics & Astronautics,2009,26(3). |
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| Authors: | Zhang Xinggan Bai Yechao |
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| Abstract: | The one-order phase of the echo changes if there is relative radial moving between the object and the radar, i.e., the Doppler effect. The Doppler effect is widely used in radar signal processing. The transverse motion of the object cannot change the one-order phase of the echo, but the high-order phase. The high-order Doppler effect of the transverse moving target is presented and a new algorithm for obtaining the transverse velocity is given. The scalar velocity of a target moving steadily in any direction can be calculated with one-order and two-order items of the echo phase. The calculating method and simulating results are given.As the transverse speed is 900 km/h, the speed calculation error is less than 0.06% if SNR of echo signal is higher than 0 dB. |
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| Keywords: | Doppler effect curve fitting transverse movement phase difference |
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