Application of maximum length sequence in silent sonar

• Autorzy: Marszal J. , Salamon R. , Kilian L.
• Języki publikacji: EN

Abstrakty

EN

Silent sonars are designed to reduce the distance over which their sounding pulses can be detected by intercept sonars. In order to meet this objective, we can use periodical sounding signals that have low power, a very long duration and wide spectrum. If used in the silent sonar’s receiver, matched filtration ensures very good detection of motionless or slow moving targets. However, it is more difficult to detect echo signals of fast moving targets with Doppler effect causing significant error in target distance measurements. In an effort to find signals that can better resist Doppler effect, maximum length sequence was tested for its application in silent sonar. It has an elementary signal which includes linear frequency modulation. It was demonstrated that the signal produces much better results than those obtained with simple frequency modulation signals.

• Wydawca: Polskie Towarzystwo Akustyczne. Oddział Gdański
• Czasopismo: Hydroacoustics
• Rocznik: 2012
• Tom: Vol. 15
• Strony: 143--152
• Opis fizyczny: Bibliogr. 7 poz., rys.

Twórcy

autor

Marszal J.

autor

Salamon R.

autor

Kilian L.

• Gdansk University of Technology Faculty of Electronics, Telecommunication and Informatics Department of Marine Electronic Systems G. Narutowicza 11/12, 80-233 Gdańsk, Poland,

Bibliografia

• [1] R. Salamon, J. Marszal, J. Schmidt, M. Rudnicki, Silent sonar with matched filtration. Hydroacoustics, 14, 199-208, 2011.
• [2] J. Marszal, R. Salamon, K. Zachariasz, A. Schmidt. Doppler effect in CW FM sonar. Hydroacoustics, 14, 157-164, 2011.
• [3] J. Marszal, R. Salamon, Distance measurement errors in silent FM-CW sonar with matched filtering, Metrol.Meas. Syst. Vol. XIX, No.2, 2012.
• [4] A. G Stove, Linear FMCW Radar Techniques. IEE Proceedings-F, 139(5), 343-350, 1992.
• [5] J. Yang, T.K Sarkar, Doppler-invariant property of hyperbolic frequency modulated waveform. Microwave and optical technology letters, 48(8), 1174-1179, 2006.
• [6] D.D. Rife and J. Vanderkooy, Transfer-Function Measurement with Maximum-Length Sequences, J. Audio Eng. Soc., vol. 37, pp. 419-443, 1989.
• [7] B.P. Lathi, Z. Ding, Modern digital and analog communication systems. Oxford University Press. New York, 2010.