Resolving range ambiguities in high-repetition rate airborne light detection and ranging applications

Peter Rieger; Andreas Ullrich

doi:10.1117/1.JRS.6.063552

16 July 2012 Resolving range ambiguities in high-repetition rate airborne light detection and ranging applications

Peter Rieger, Andreas Ullrich

Author Affiliations +

Journal of Applied Remote Sensing, Vol. 6, Issue 1, 063552 (July 2012). https://doi.org/10.1117/1.JRS.6.063552

Abstract

Correctly determining a measurement range in light detection and ranging instruments, based on time-of-flight measurements on laser pulses, requires the association of each received echo pulse with its causative emitted laser pulse. Without further precautions, this definite association is only possible under specific conditions constraining the usability of range finders and laser scanners with very high measurement rates. We give an introduction to known techniques for avoiding and resolving range ambiguities. The specific disadvantages of these methods led to the development of a technique based on pulse-position modulation (PPM) of the laser pulse train using a pseudorandom noise signal and the subsequent analysis of the impact of the PPM on groups of consecutive range measurements. The error probability of our approach has been evaluated by simulations based on real scan data. The use of a discrete uniform distribution of amplitudes as a modulation signal shows high detection robustness even for difficult terrain like forest areas. The encouraging results of the simulations led to the practical implementation of PPM to our laser scanners and the development of the associated software RiMTA, which resolves range ambiguities without the necessity of a priori information on the target situation and without any user interaction required.

Citation Download Citation

Peter Rieger and Andreas Ullrich "Resolving range ambiguities in high-repetition rate airborne light detection and ranging applications," Journal of Applied Remote Sensing 6(1), 063552 (16 July 2012). https://doi.org/10.1117/1.JRS.6.063552

Published: 16 July 2012

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available