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Time variable gain for long range sonar with chirp sounding signal

Abstract

The main purpose of applaying Time Variable Gain (TVG) in active sonars with digital signal processing is to reduce dynamic range of echo signal and adapt it to the dynamic range of the analogue to digital conversion. With high transmission losses level, the dynamic range of the input signal in long range sonars can be very high and even exceed 200dB. When chirp sounding signals with matched filtration are used, sonars can raech very long ranges. The article presents optimisation of TVG control for long range sonars. It also looks at the influence of chirp sounding signal compression, the result of digital matched filtration, for the TVG controlling. The examples of obtained results are presented.

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Category:
Articles
Type:
artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Published in:
HYDROACOUSTICS no. 10, pages 117 - 122,
ISSN: 1642-1817
Language:
English
Publication year:
2007
Bibliographic description:
Marszal J., Ostrowski Z., Schmidt J., Kilian L., Jedel A., Schmidt A.: Time variable gain for long range sonar with chirp sounding signal// HYDROACOUSTICS. -Vol. 10., (2007), s.117-122
Verified by:
Gdańsk University of Technology

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