Waveform design considerations for modulated pulse lidar

Shawn O'Connor; Robert Lee; Linda Mullen; Brandon Cochenour

doi:10.1117/12.2050395

5 June 2014 Waveform design considerations for modulated pulse lidar

Shawn O'Connor, Robert Lee, Linda Mullen, Brandon Cochenour

Proceedings Volume 9111, Ocean Sensing and Monitoring VI; 91110P (2014) https://doi.org/10.1117/12.2050395
Event: SPIE Sensing Technology + Applications, 2014, Baltimore, MD, United States

Abstract

Techniques have been developed to mitigate many of the issues associated with underwater imaging in turbid environments. However, as targets get smaller and better camouflaged, new techniques are needed to enhance system sensitivity. Researchers at NAVAIR have been developing several techniques that use RF modulation to suppress background clutter and enhance target detection. One approach in particular uses modulation to encode a pulse in a synchronous line scan configuration. Previous results have shown this technique to be effective at both forward and backscatter suppression. Nearly a perfect analog to modulated pulse radar, this technique can leverage additional signal processing and pulse encoding schemes to further suppress background clutter, pull signals out of noise, and improve image resolution. Additionally, using a software controlled transmitter, we can exploit this flexibility without the need to change out expensive hardware. Various types of encoding schemes were tested and compared. We report on their comparative effectiveness relative to a more conventional non-coded pulse scheme to suppress background clutter and improved target detection.

Citation Download Citation

Shawn O'Connor, Robert Lee, Linda Mullen, and Brandon Cochenour "Waveform design considerations for modulated pulse lidar", Proc. SPIE 9111, Ocean Sensing and Monitoring VI, 91110P (5 June 2014); https://doi.org/10.1117/12.2050395

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