BIAS-FREE ESTIMATES OF THE VARIANCE OF TIME OF ARRIVAL DIFFERENCES

Authors
  1. Yansouni, P.A.
Corporate Authors
Defence Research Establishment Ottawa, Ottawa ONT (CAN)
Abstract
In the frequency domain estimation of time of arrival differences, phase data of cross spectrum may show correlation between frequency bins due to either insufficient time-bandwidth product or the use of a nonrectangular window on the input signal samples. This correlation severely biases variance estimates if standard results of generalized least square theory are applied indiscriminately. A technique has been developed to eliminate the bias of variance estimates. Simulation results are provided.
Date of publication
01 Jan 1985
Number of Pages
4
Reprinted from
IEEE Transactions on Acoustics, Speech and Signal Processing, vol ASSP-33, no 2, 1985, p 483-486
DSTKIM No
86-03024
CANDIS No
97721
Format(s):
Hardcopy;Originator's fiche received by DSIS

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