调频连续波激光雷达距离-多普勒解耦新方法

王俏; 杜小平; 赵继广

调频连续波激光雷达距离-多普勒解耦新方法

装备学院科研部, 北京 101416

详细信息

中图分类号: TN 95
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出版历程
- 收稿日期: 2011-09-20
- 网络出版日期: 2012-05-30

New range-Doppler decoupling method for FMCW ladar

Department of Science Research, Academy of Equipment, Beijing 101416, China

摘要

摘要: 调频连续波激光雷达探测运动目标时,通常采用二维傅里叶变换解耦合方法.当探测高速运动目标时,由于目标移动导致不同调频周期的中频信号频谱峰值不在同一距离单元,用二维傅里叶变换法进行解耦将产生速度模糊.新的解耦方法通过对多个周期的中频信号频谱峰值位置进行直线拟合,获得目标径向速度估计值.利用速度估计值构建多普勒补偿信号,并与原中频信号相乘.补偿后的中频信号频谱峰值在同一距离单元内.将补偿后的中频信号用二维傅里叶变换法获得的径向速度与之前的速度估计值相加,得到最终的目标径向速度.仿真结果说明新方法在获得较高测距、测速精度的同时,可以有效提高调频连续波激光雷达的无模糊速度.
- 调频连续波 /
- 激光雷达 /
- 距离-多普勒解耦合
Abstract: FMCW(frequency modulation continues wave) ladar could detect moving target. It often uses 2-dimension FFT method to decouple range and doppler frequency. When detecting high speed target, different chirp period spectrum peaks are not in the same range bin, and using 2-dimension FFT method would acquire a fuzzy speed. In the new decoupling method, one fitting line was acquired from serial period-s spectrum peaks at first, and an estimated speed was achieved. Then a Doppler compensation signal based on the estimated speed was given and plus with the original IF signal. It makes the spectrum peaks of serial periods compensated IF signal are in the same range bin. By using 2-dimension FFT method on compensated IF signal, a compensated speed was achieved. And the target speed could be the sum of compensated speed and estimated speed. Simulation results indicate that the new range-Doppler decoupling method could effectively extend no fuzzy velocity of FMCW ladar, and achieve high precision of target range and velocity at the same time.
- frequency modulation continues wave(FMCW) /
- ladar /
- range-Doppler decoupling

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参考文献(9)

[1]	Stann B L,Ruff W C,Sztankay Z G.Intensity-modulated diode laser radar using frequency-modulation/continuous-wave ranging techniques[J].Optical Engineering,1996,35(11):3270-3278
[2]	Liu J J,Von Der Lippe C M.Advanced high-bandwidth optical fuzing technology[J].Nanophotonics for Communication:Materials and Devices II,2005,6017(1):60170F
[3]	Von Der Lippe C M,Liu J J.Optical fuzing technology[J].Laser Radar Technology and Applications XI,2006,6214(1):62140D
[4]	Stan B L,Abou-Auf A,Aliberti K,et al.Research progress on focal plane array ladar system using chirped amplitude modulation[J].Laser Radar Technology and Applications VII,2003,5086(1):47-57
[5]	杨勇,谭渊,张晓发,等.LFMCW雷达运动目标距离与速度超分辨估计[J].信号处理,2010,26(4):626-630 Yang Yong,Tan Yuan,Zhang Xiaofa,et al.Super-resolution range and velocity estimation of moving target in LFMCW radar[J].Signal Processing,2010,26(4):626-630(in Chinese)
[6]	毕欣,杜劲松.车载LFMCW雷达多运动目标探测算法研究[J].传感器与微系统,2011,30(6):26-29 Bi Xin,Du Jinsong.Study of LFMCW radar multi moving target detection algorithm for automotive application[J].Transducer and Microsystem Technology,2011,30(6):26-29(in Chinese)
[7]	侯志,缪晨,张金栋,等.复杂探测背景下的LFMCW雷达动目标二维检测方法[J].西安电子科技大学学报,2011,38(4):167-172 Hou Zhi,Miao Chen,Zhang Jindong,et al.Moving target detection and processing method of LFMCW radar under complex background[J].Journal of Xidian University,2011,38(4):167-172(in Chinese)
[8]	Brian C Redman,William C Ruff,Keith Aliberti.Direct detection laser vibrometry with an amplitude modulated ladar //Proc SPIE.Orlando,FL,USA: ,2004,5412:218-228
[9]	Wei Yufei,Fei Jindong,Mi Qiang,et al.High resolution ladar for multi-dimension detection:design,modeling and simulation //Proc SPIE.Beijing: ,2009,7382:73825D