New technique locates robots, soldiers in GPS-challenged areas

Science Daily   October 9, 2018
Researchers at the US Army Research Laboratory have developed a technique for determining DoA of a radio frequency signal source based on an algorithm that statistically models the received signal strength (RSS) gradient and controls for spatial outliers and correlations. When the signal is extremely noisy, the estimator correctly outputs that no DoA is present and the output is an estimated DoA and associated uncertainty. The technique works in conditions of heavy multipath, does not require any fixed infrastructure, does not rely on prior training data, knowledge about the environment, multiple antennas, or prior calibration between nodes. They have validated the approach with datasets at 40MHz and 2.4GHz bands, as well as data from high fidelity simulations…read more. TECHNICAL ARTICLE 

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