I.V. Gogolev - Engineer, JSC «Research Institute «Vector». E-mail: pacific-182@mail.ru G.Yu. Yashin - Ph.D. (Phys.-Math.), Senior Specialist, JSC «Research Institute «Vector»

The standard methods of signal emitter Geolocation with distributed receiver network Time-Difference-Of-Arrival and Frequency-Difference-Of-Arrival (TDOA and FDOA) based on narrowband signal model. Narrowband signal model approach in this methods determined by assumption of constant time and frequency differences during all measurement. In fact, in case of continuous measurement by moving receiver, propagation time is a function of receive moment. As a result of investigation we can talk about simple criteria - in case of Doppler spectrum width is more than required frequency estimation accuracy narrow band model is no more suitable. So we can-t consider the received signals like a time delayed and frequency shift copy of transmitted signal. In paper the new wideband signal parameters and TDOA/FDOA modification for passive location were developed. In case of wideband signal new parameters of time scale and delay estimation was proposed.

 

1. Pourhomayoun M., Fowler M.L. Exploiting Cross Ambiguity Function Properties for Data Compression in Emitter Location Systems // 45th Annual Conference on Information Sciences and Systems (CISS). Cologne. Germany. 2011.
2. Musicki D., Koch W. Geolocation using TDOA and FDOA measurements // Proceedings of the 11th International Conference on Information Fusion. Cologne. Germany. 2008.
3. Straight D.A. Maximum-Likelihood Estimators for the TDOA FDOA of Arrival of Cyclostationary Digital Communications signals. California. USA. 1999.
4. Yatrakis C.L. Computing the Cross Ambiguity Function. Binghamton University. State University of New York. 2005.
5. Stein S. Differential delay/Doppler ML estimation with unknown signal // IEEE transactions on signal processing. 1993. V. 41. № 8.
6. Johnson J.J. Implementing the cross ambiguity function and generating geometry-specific signals. California. USA. 2001.
7. Swick D.A. An ambiguity function independent of assumptions about bandwidth and carrier frequency. 1966.
8. Swick D.A. A review of wideband ambiguity functions. 1969.
9. Weiss L.G. Wavelets and wideband correlation processing // IEEE Signal Processing Magazine. 1994. P. 13-32.
10. Andronov A. Kosmicheskaja sistema radiotekhnicheskojj razvedki VMS SSHA «Uajjt Klaud»// Zarubezhnoe voennoe obozrenie. 1993. Vyp. 7. S.46-56.