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Noise effect on parameters of quiet sonar with code modulation

Salamon Roman, Marszal Jacek, Jedel Andrzej

Vibrations in Physical Systems

2023

Vol. 34, nr 1

art. no. 2023109

Earlier publications of the paper authors have shown that the use of code keying mixed with the CW FM sound signal allows the significant reduction in the distance measurement error, compared to classic silent CW FM sonar. In addition to the code modulation parameters, the magnitude of this error is influenced by the received input acoustic noise. The article shows the dependence of the input signal-to-noise ratio and the sound signal parameters on the target distance measurement error and the detection conditions, such as the output signal-to-noise ratio and the side lobe level. The results of the analysis were compared to the same parameters of the CW FM silent sonar without code modulation.