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

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

doi:10.1117/12.836465

29 August 2009 High-resolution ladar for multidimension detection: design, modeling, and simulation

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

Proceedings Volume 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging; 73825D (2009) https://doi.org/10.1117/12.836465
Event: International Symposium on Photoelectronic Detection and Imaging 2009, 2009, Beijing, China

Abstract

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.

Citation Download Citation

Yu-fei Wei, Jin-dong Fei, Qiang Mi, and Yang Gao "High-resolution ladar for multidimension detection: design, modeling, and simulation", Proc. SPIE 7382, International Symposium on Photoelectronic Detection and Imaging 2009: Laser Sensing and Imaging, 73825D (29 August 2009); https://doi.org/10.1117/12.836465

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