1 October 2007 Influence of laser radar sensor parameters on range-measurement and shape-fitting uncertainties
Author Affiliations +
Optical Engineering, 46(10), 106201 (2007). doi:10.1117/1.2789654
In object/target reconstruction and recognition based on laser radar data, the range value's accuracy is important. The range data accuracy depends on the accuracy in the laser radar's detector, especially the algorithm used for time-of-flight estimation. In this paper, a general direct-detection laser radar system applicable for hard-target measurements is modeled. The time- and range-dependent laser radar cross sections are derived for some simple geometric shapes (plane, cone, sphere, and paraboloid). The cross-section models are used, in simulations, to find the proper statistical distribution of uncertainties in time-of-flight range estimations. Three time-of-flight estimation algorithms are analyzed: peak detection, constant-fraction detection, and matched filter. The detection performance for various shape conditions and signal-to-noise ratios is analyzed. Two simple shape reconstruction examples are shown, and the detectors' performance is compared with the Cramér-Rao lower bound. The performance of the peak detection and the constant-fraction detection is more dependent on the shape and noise level than that of the matched filter. For line fitting the matched filter performs close to the Cramér-Rao lower bound.
Christina Anna Grönwall, Ove K. Steinvall, Fredrik Gustafsson, Tomas R. Chevalier, "Influence of laser radar sensor parameters on range-measurement and shape-fitting uncertainties," Optical Engineering 46(10), 106201 (1 October 2007). http://dx.doi.org/10.1117/1.2789654


Signal to noise ratio


Optical spheres

Error analysis

Laser systems engineering

Optical filters


Plastic optical fibers for transmission and sensors
Proceedings of SPIE (February 23 2005)
MEMS device for mass market gas and chemical sensors
Proceedings of SPIE (August 15 2000)
Ship Classification And Aimpoint Maintenance
Proceedings of SPIE (May 03 1988)
A new method of pulse edge detection in low SNR
Proceedings of SPIE (December 14 2015)

Back to Top