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Robust Self-Calibration of Constant Offset Time-Difference-of-Arrival

Citation Author(s):
Gabrielle Flood, Thejasvi Beleyur, Viktor Larsson, Holger R. Goerlitz, Magnus Oskarsson, Kalle Åström
Submitted by:
Kenneth Batstone
Last updated:
9 May 2019 - 10:39am
Document Type:
Poster
Document Year:
2019
Event:
Presenters:
Kenneth Batstone and Kalle Åstöm
Paper Code:
3442
 

In this paper we study the problem of estimating receiver and sender positions from time-difference-of-arrival measurements, assuming an unknown constant time-difference-of- arrival offset. This problem is relevant for example for repetitive sound events. In this paper it is shown that there are three minimal cases to the problem. One of these (the five receiver, five sender problem) is of particular importance. A fast solver (with run-time under 4 μs) is given. We show how this solver can be used in robust estimation algorithms, based on RANSAC, for obtaining an initial estimate followed by local optimization using a robust error norm. The system is verified on both real and synthetic data.

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