Abstract
To describe the behaviour of randomly time-variant linear channels is comparably easy assuming a wide sense stationary uncorrelated scattering (WSSUS) channel. Its properties are formulated by the scattering function. Some measured scattering functions are presented. The scattering function is shown to comprehend the sea state influence only. However the observed variability is often due to changes in sound speed layers or water level. These slow fluctuations effect an unstationarity during the time intervals of local stationarity of the sea state.
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References
Bello, P.A. “Characterization of Randomly Time-Variant Linear Channels”, IEEE Trans., CS-11: 360, (1963)
Bello, P.A. “Time-Frequency Duality”, IEEE Trans., IT-10: 18, (1964)
Price, R. and Green, P.E. Jr. “Signal Processing in Radar Astronomy”, M.I.T. Lincoln Lab., T.R. 234, (1960)
Thiele, R. “Anwendung der Theorie zeitveränderlicher Filter zur Beschreibung des Flachwasser-Schallkanals”, (Application of the Time-Variant Filter Theory to the Description of the Shallow Water Sound Channel), Thesis T.U. Hannover (1972)
Laval, R. “Sound Propagation Effects on Signal Processing”, in “Signal Processing” (Proceedings of the NASI on Signal Processing) Academic Press, London (1973), P. 223
Ellinthorpe. A.W. and Nutall, A.H. “Theoretical and Empirical Results on the Characterization of Undersea Acoustic Channels”, IEEE 1st Ann. Comm. Conv.: 585, (1967)
Thiele, R. “Shallow Water Channel Analysis by the Time Variant Weighting Function”, SACLANTCEN Conference Proc. No. 14, Vol. 11: 173 (1974)
Roderick, W.I., Cron, B.F. “Frequency Spectra of For¬ward Scattered Sound from the Ocean Surface”, J. Acoust. Soc. Am., 48: 759 (1970)
Beckmann, P. and Spizzichino, A. “The Scattering of Electromagnetic Waves from Rough Surfaces”, Pergamon Press, Oxford (1963), p. 125
Wille, P. and Thiele, R. “Horizontal Coherence of Explosive Signals in Shallow Water”, J. Acoust. Soc. Am. 50: 348 (1971)
Smith, P.W. Jr. “Statistics of Fluctuations in Measures of Sound Propagated in Shallow Water”, Bolt Beranek and Newman Inc., Report 2498 (1973)
Wassiljeff, A. “Spatial Horizontal Coherence of Acoustical Signals in Shallow Water”, SACLANTCEN SM-68 (1975)
Scholz, B. “Horizontal Coherence Measurements with Explosive Sources in Shallow Water”, SACLANTCEN, Conference Proc., No. 13, Vol. I (1974)
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© 1977 D. Reidel Publishing Company, Dordrecht-Holland
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Thiele, R. (1977). Measurement of the Weighting Function of the Time-Variant Shallow Water Channel. In: Tacconi, G. (eds) Aspects of Signal Processing. NATO Advanced Study Institutes Series, vol 33-1. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-1223-2_8
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DOI: https://doi.org/10.1007/978-94-010-1223-2_8
Publisher Name: Springer, Dordrecht
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