Robust NLoS multipath mitigation for TOA estimation

A technique that consists of correlation followed by thresholding is widely used to mitigate multipath effects, especially in the presence of non-line-of-sight (NLoS) effects, for TOA estimation. In practice, an accurate threshold that the technique relies on is difficult to obtain, since optimizing the threshold requires prior knowledge of channel statistics and signal/noise power, which are not always known a priori nor are easy to estimate. In this paper, we propose a new thresholding method that does not rely on such prior knowledge and is robust against an inaccurate threshold.