Receiver of Doppler multistatic system for moving target detection and tracking

• Autorzy: Ostrowski Z. J.
• Języki publikacji: EN

Abstrakty

EN

The article presents a method for solving major structural problems that occur in the receiver used in the multistatic Doppler system, aimed at determination of the trajectory and velocity of a moving target. In the system two transmitters emit acoustic continuous sinusoidal waves at different frequencies. The signals, scattered from a moving target are received by four hydrophones. Beside of the echoes, much larger signals coming directly from transmitters are recorded. It has been proved that in the presence of the direct high-amplitude signal, using currently available A/D converters, there is no possibility to detect the Doppler shift of small signals. The proposed approach is based on the homodyne frequency conversion of the received signals. Subsequently, the constant component and other unwanted products of the frequency conversion are filtered. The results of computer simulation have shown the effectiveness of the adopted design solution.

Słowa kluczowe

EN

positioning system; Doppler shift; homodyne detection

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2015
• Tom: Vol. 18
• Strony: 141--152
• Opis fizyczny: Bibliogr. 4 poz., rys.

Twórcy

autor

Ostrowski Z. J.

• Gdansk University of Technology Faculty of Electronics, Telecommunications and Informatics Department of Marine Electronic Systems, Gabriela Narutowicza 11/12, 80-233 Gdańsk

Bibliografia

• [1] R. Salamon, J. Marszal, Doppler Estimation Method for Moving Target Location, Hydroacoustics, Vol. 13, pages 225-234, 2010.
• [2] Z. J. Ostrowski, The Doppler effect in a bistatic system for determining the position of moving targets, Hydroacoustics, Vol. 17, pages 225-234, 2014.
• [3] J. Marszal, R. Salamon, Multistatic Doppler Sonar for Man-Made Lakes and Water-Power Plants Antiterroristic Protection, Proc. of the 10th European Conference on Underwater Acoustic, pages 1333-1339, Istanbul 2010.
• [4] R. Salamon, Systemy hydrolokacyjne, Gdańskie Towarzystwo Naukowe, 2006.