HYDROACOUSTICS
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Analysis of distance measurement errors in CW FM sonar with MLS code modulation

pp. 75-84, vol. 20, 2017

Andrzej Jedel
Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Poland

Jacek Marszal
Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Poland

Roman Salamon
Gdansk University of Technology, Faculty of Electronics, Telecommunications and Informatics, Poland

Key words: CW FM sonar; pseudorandom sequence; Doppler effect; sonar parameters

Abstract: Although used in the classic silent sonar, the CW FM sounding signal has a major flaw which is its inaccuracy in determining the distance to a target. The authors of the article have developed a concept of silent sonar using frequency modulation signals switched by pseudorandom codes, already discussed in their previous work. This article presents a detailed analysis of errors in CW FM sonar with pseudo-random sequence code modulation confronted with errors which occur in similar sonar without code modulation.

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© Polish Acoustical Society - Gdansk Department, Polish Academy of Sciences. This work is licensed under the Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported. (CC BY-NC-SA 3.0)