Title :
Robustness of TOA and TDOA Positioning Under Suboptimal Weighting Conditions
Author :
Ju-Yong Do ; Rabinowitz, M. ; Enge, Per
Author_Institution :
Stanford Univ., Stanford
fDate :
7/1/2007 12:00:00 AM
Abstract :
The performance robustness of time of arrival (TOA) and time difference of arrival (TDOA) is evaluated when measurement variances are not accurately known or are approximated. If the actual variances are applied, then TOA and TDOA are known to have equal performance. However, if suboptimal weighting matrices are applied either due to inaccurate knowledge of measurement error statistics or for simplified implementations in practice, there are performance losses proportional to the number of ranging sources.
Keywords :
Monte Carlo methods; error statistics; measurement errors; time-of-arrival estimation; suboptimal weighting matrices; time difference of arrival; time of arrival; Covariance matrix; Error analysis; Least squares approximation; Loss measurement; Measurement errors; Performance loss; Position measurement; Robustness; Time difference of arrival; Time measurement;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2007.4383608
