Mr. Yufei Wei Profile

Yufei Wei

at Beijing Electronic System Engineering Institute

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Proceedings Article | 29 August 2009 Paper

High-resolution ladar for multidimension detection: design, modeling, and simulation

Yu-fei Wei, Jin-dong Fei, Qiang Mi, Yang Gao

Proceedings Volume 7382, 73825D (2009) https://doi.org/10.1117/12.836465

KEYWORDS: LIDAR, Doppler effect, Imaging systems, Modulation, Velocity measurements, Sensors, Signal processing, Signal detection, Radar imaging, Frequency modulation

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As the development of application requirements, to obtain more information of the object is an important direction in many research fields. Not only 2-D image, but also range and velocity information are required. Hence, the imaging laser radar technology, which can obtain 3-D or even 4-D information, has been paid more attention. Because of the high range resolution character and direct Doppler frequency shift measurement function, frequency modulation / continuous wave (FM/CW) imaging laser radar can be called a 4-D imaging system. The modulated laser floodlights a moving object, and then the reflecting light is received by optical system and captured by a focal plane array. After obtaining a series of images, the range-Doppler processing algorithm is performed on the pixels with the same position in all the images to calculate the object's range and velocity information, and then a 4-D image (angle - angle - range - velocity) with high accuracy is obtained. This paper describes the FM/CW ladar system's principle, and presents an improved process algorithm to solve the problem of the traditional range-Doppler algorithm's limit used for high velocity object. The simulation results in typical object situation prove that the improved process algorithm could increase the velocity measurement range effectively.

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