Abstract
In this article, an algorithm for determining RRS coordinates on the basis of Extended Kalman Filter with the processing of Time of Arrival (ToA) type measurements is proposed. The feature of the proposed algorithm is to determine the radio radiation source (RRS) time of transmission (ToT) in the MLAT system time scale and its filtration using priori information about the period of transmission. It's shown that evaluation of ToT and its filtration at a known period allows you to get closer to the accuracy provided by Time Of Fligth (ToF) method, which can not be implemented directly for MLAT systems. This hypothesis was confirmed by modeling several algorithms: one-step TDoA, filtered TDoA, filtered ToA and one-step ToF. Modeling was performed for both the known constant period and the non constant period. In both cases, the efficiency of the proposed ToA-F algorithm was the same. The efficiency of various algorithms was compared, including the traditional ones based on the calculation of arrival time differences and the proposed one based on ToA observations and using information about transmission period. The most important result was that the ToT estimation and filtering allows to achieve the properties of the ToF method in the MLAT system.
Published Version
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call