Vol. 10, issue 12, article # 17

Il'in N. V., Orlov I. I. To the theory of sounding with chirps. // Atmospheric and oceanic optics. 1997. V. 10. No. 12. P. 953-956. PDF
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Abstract:

A method for sounding of an underwater acoustic channel with broadband chirps with preliminary signal processing by the frequency compression method is analyzed on the basis of the theory of linear systems. The dependence of a recorded spectrum on group delays in the channel and current frequency of sounding signal is obtained. It is shown that the result of processing of an individual sampling of received signal under several commonly used assumptions is mathematically equivalent to sounding with narrow-band complex signal whose delays determine the maxima of recorded signal modulus.