Adaptive underwater channel estimation for hybrid lidar/radar
Robert W. Lee, David W. Illig, Linda J. Mullen · Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 2017
Adaptive filtering and channel estimation techniques are applied to laser based ranging systems that utilize wide-band intensity modulation to measure the range and reflectivity of underwater objects. The proposed method aims to iteratively learn the frequency dependent characteristics of the underwater environment using a frequency domain adaptive filter, which results in an estimate for the channels optical impulse response. This work presents the application of the frequency domain adaptive filter to simulated and experimental data, and shows it is possible to iteratively learn the underwater optical channel impulse response while using Hybrid Lidar/Radar techniques.