| FMCW雷达差频信号的非线性分析 |
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| 引用本文： | 王虹,李兴国. FMCW雷达差频信号的非线性分析[J]. 电光与控制, 2010, 17(10) |
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| 作者姓名： | 王虹 李兴国 |
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| 作者单位： | 南京理工大学电光学院,南京,210094 |
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| 摘 要： | FMCW雷达具有大的时宽带宽积,可达到较高的测距精度,但由于压控振荡器等器件非线性的存在,使测距精度大大降低。通过理论分析这一非线性对用于测距的差频信号频谱的影响,结合直接采集和实测相应的差频信号,确定非线性误差的来源和频率范围。采用模拟窄带滤波,降低扰频信号干扰,并通过实验测量,验证了利用该方法可以达到提高测距精度的效果。
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| 关 键 词： | 测距精度 差频 非线性 窄带滤波 |
Analysis to Nonlinearity of Difference-Frequency Signal for FMCW Radar |
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| WANG Hong,LI Xingguo. Analysis to Nonlinearity of Difference-Frequency Signal for FMCW Radar[J]. Electronics Optics & Control, 2010, 17(10) |
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| Authors: | WANG Hong LI Xingguo |
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| Affiliation: | WANG Hong,LI Xingguo(School of Electronic Engineering , Opto-electronic Technique,Nanjing University of Science , Technology,Nanjing 210094,China) |
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| Abstract: | FMCW radars can have high precision of ranging due to its large time-bandwidth product,but the precision may be decreased greatly because of the nonlinearity of some devices such as Voltage-Controlled Oscillator(VCO).The impact of this nonlinearity upon difference frequency signal for range detection was analyzed theoretically,and the difference frequency signal corresponding to the test was acquired directly to determine the source and the frequency range of nonlinear error.Narrow band filter was used to r... |
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| Keywords: | FMCW |
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