2 November 2004 Deconvolution of laser pulse profiles from 3D ladar temporal returns
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Abstract
3-D imaging LADAR systems that are capable of rapid frame acquisition may suffer from a loss of range resolution due to the duration of the pulse transmitted to the target. Because of the tradeoff between the requirement to produce sufficient illumination and the desire to obtain high range resolution, these systems may sacrifice range resolution in favor of improved signal to noise ratio of the detected signal. In this paper, deconvolution techniques are employed in order to obtain improved range resolution from a sequence of laser radar return images collected at extremely high speeds. The study pursued in this paper explores the degree to which range resolution can be improved in the presence of photon and speckle noise. Noise amplification in the deconvolution process serves to degrade the signal to noise ratio of the reconstructed laser radar return images. The performance of the reconstruction algorithm is quantified through the estimation of the probability of detection. It will be shown that both the probability of detection and range resolution can be improved in imaging laser radar systems.
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Stephen C. Cain, "Deconvolution of laser pulse profiles from 3D ladar temporal returns", Proc. SPIE 5558, Applications of Digital Image Processing XXVII, (2 November 2004); doi: 10.1117/12.560287; https://doi.org/10.1117/12.560287
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