ON THE ACCURACY OF TDOA-BASED PASSIVE LOCALIZATION OF EMITTERS
This study addresses a problem of passive emitter localization based on time difference of arrivals (TDOAs) in two dimensions using three sensors. For this purpose, firstly, TDOA-based methods that have been proposed in the literature for estimating emitter location are investigated. Among these studies, a method that gives a simple but deterministic solution is determined. As the derivation of the solution is deterministic, developments are required to ensure its usability in practice. This is because, in practice, especially in an operational environment in electronic warfare, exact positions of the sensors may be unknown, and there may be error in TDOA measurements. Obviously, any errors that may be in sensor positions or in TDOA measurements adversely affect the accuracy of passive emitter localization. For this reason, this study aims to analyze the accuracy of the localization method by introducing measurement error on the TDOAs. To this end, simulations representing realistic scenarios in under various conditions are conducted. In this way, measurement error in TDOAs is considered to test, numerically, the limits of proposed localization technique for realistic scenarios. Future works considered to increase the accuracy of the method are also discussed.
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