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...

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Bibliographic Details
Main Authors: Yan, Chunpeng, Fan, H H, Martin, Richard K
Format: Report
Language:English
Subjects:
ACCURACY
CORRELATION
ESTIMATES
MULTIPATH TRANSMISSION
NOISE
POWER SPECTRA
Radiofrequency Wave Propagation
SIGNALS
STATISTICS
SYMPOSIA
THRESHOLD EFFECTS
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Summary: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. See also ADM002314. Presented at the IEEE International Conference on Acoustics, Speech and Signal Processing (34th) held in Taipei, Taiwan on 19-24 April 2009. U.S. Government or Federal Purpose Rights License