Short pulselength heterodyne laser radar reflective tomography: projection generation and signal-to-noise ratios

Charles L. Matson

doi:10.1117/12.216956

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18 August 1995 Short pulselength heterodyne laser radar reflective tomography: projection generation and signal-to-noise ratios

Charles L. Matson

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Proceedings Volume 2562, Radar/Ladar Processing and Applications; (1995) https://doi.org/10.1117/12.216956
Event: SPIE's 1995 International Symposium on Optical Science, Engineering, and Instrumentation, 1995, San Diego, CA, United States

Abstract

Expressions for the detected signal reflected from an object using a coherent laser radar system are developed in this paper. Post-processing methods to obtain intensity projection data from the detected signals are derived. Image domain signal-to-noise ratios (SNRs) are derived both for images reconstructed using a convolution-backprojection algorithm from range- resolved reflective measurements and for the intensity projection data. The two noise sources considered are photon noise and laser speckle noise. It is shown that the SNR of an individual projection at a point is limited above by one, and the upper limit of the SNR of the reconstructed image is on the order of the square root of the number of projections used to create the image.

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Charles L. Matson "Short pulselength heterodyne laser radar reflective tomography: projection generation and signal-to-noise ratios", Proc. SPIE 2562, Radar/Ladar Processing and Applications, (18 August 1995); https://doi.org/10.1117/12.216956

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