A study of binary codes to improve LIDAR performance
A study of binary codes to improve LIDAR performance
This thesis discusses the use of Pseudo-Random (PR) and other forms of encoding in LIDAR systems. This allows the efficient use of low peak power continuous wave (CW) light sources. Two families of PR sequences have been examined, in addition to other specific ranging codes, and their properties described. It is shown how these may be improved further by temporal dithering and other processing techniques.
A computer simulation of a PR encoded LIDAR has been developed, to investigate system behaviour and explore conditions that are difficult to model analytically. Such simulations of simple LIDAR systems and DIAL retrievals have been used to design an experimental system.
An experimental simulator/prototype, based on a digital design, has been designed and built, and after evaluation in fibre is currently being used in a LIDAR test-rig. Results from 200-400m LIDAR returns are reported, along with early tests of a dual channel DIAL demonstrator. Observed and expected causes of dynamic range reduction are explored via simulation and experiment, examining origin of the behaviour and possible reduction strategies. Possible future directions are outlined in the final part of this thesis.
University of Southampton
Keen, Tristan Edward Thomas
1997
Keen, Tristan Edward Thomas
Keen, Tristan Edward Thomas
(1997)
A study of binary codes to improve LIDAR performance.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis discusses the use of Pseudo-Random (PR) and other forms of encoding in LIDAR systems. This allows the efficient use of low peak power continuous wave (CW) light sources. Two families of PR sequences have been examined, in addition to other specific ranging codes, and their properties described. It is shown how these may be improved further by temporal dithering and other processing techniques.
A computer simulation of a PR encoded LIDAR has been developed, to investigate system behaviour and explore conditions that are difficult to model analytically. Such simulations of simple LIDAR systems and DIAL retrievals have been used to design an experimental system.
An experimental simulator/prototype, based on a digital design, has been designed and built, and after evaluation in fibre is currently being used in a LIDAR test-rig. Results from 200-400m LIDAR returns are reported, along with early tests of a dual channel DIAL demonstrator. Observed and expected causes of dynamic range reduction are explored via simulation and experiment, examining origin of the behaviour and possible reduction strategies. Possible future directions are outlined in the final part of this thesis.
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Published date: 1997
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Local EPrints ID: 463098
URI: http://eprints.soton.ac.uk/id/eprint/463098
PURE UUID: b2b5fc72-445c-4184-9c72-6736c1cb04a6
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Date deposited: 04 Jul 2022 20:44
Last modified: 04 Jul 2022 20:44
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Author:
Tristan Edward Thomas Keen
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