Increasing the signal-to-noise ratio in APD-based scanning LiDAR sensors on the transmission side

Publikationstyp
Conference Paper
Date Issued
2017-10-11
Sprache
English
Author(s)
Fersch, Thomas  
Weigel, Robert  
Kölpin, Alexander  orcid-logo
TORE-URI
http://hdl.handle.net/11420/6560
Article Number
8066038
Citation
IEEE Conference on Recent Advances in Lightwave Technology, CRALT: 8066038 (2017-10-11)
Contribution to Conference
IEEE Conference on Recent Advances in Lightwave Technology, CRALT 2016  
Publisher DOI
10.1109/CRALT.2016.8066038
An alternative method to increase the signal-to-noise ratio of scanning LiDAR systems based on avalanche photo diodes with high requirements on signal quality, angular resolution, field-of-view and range is presented. Limitations of established methods for use in miniaturized, cost sensitive systems are highlighted. With minimum changes of the traditional laser driver setup and the introduction of a Matched Filter the signal quality can be improved by emitting multiple laser pulses in short succession. A nearly linear improvement of signal-to-noise ratio with the number of emissions was found. Experimental data was recorded and post-processed to demonstrate the approach's benefit.
Subjects
Laser radar
LiDAR
matched filter
signal modulation
time-of-flight