UWB Radar Imaging Based Multipath Delay Prediction for NLOS Position Estimation
Conventional Time-of-Arrival (ToA) based Ultra-WideBand (UWB) positioning suffers strongly from multipath. Harsh propagation environments or Non-Line-Of-Sight (NLOS) situations lead to biased position estimates with high estimation errors. To overcome this problem, the authors propose a radar imaging based method to predict delays of dominant propagation paths. This is done in a three-step approach: first, a radar image of the environment is created using measured training data. They generate a scattering coefficient map with the large synthetic aperture of distributed and moving antennas.