Conclusion
Having presented the results one can note that, in recent years, the nonquasistatic theory of waves in media with parameters which fluctuate in space and time has achieved definite results. The effect of various factors on the spectral, energetic and polarization characteristics of waves has been clarified. At the same time, a number of problems remain insufficiently explained. For example, in the works cited above, the attention has been focused mainly on the analysis of correlation functions of a complex field. Other correlation functions (of phase, frequency, etc.) which are also of interest, have not been studied a great deal. The problem of strong fluctuations under a longitudinal propagation if slow waves in flows has not been completely clarified. The role of nonquasistaticity of fluctuations for higher-order moments (in particular, intensity fluctuations) has not been studied. Finally, for applications to realistic situations, it would be desirable to generalize the theory to the case of signals which are initially nonmonochromatic, to the case of statistically nonstationary media and, in addition, to active and nonlinear media.
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Gorkii State University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Radiofizika, Vol. 30, No. 1, pp. 3–35, January, 1987.
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Gavrilenko, V.G., Stepanov, N.S. Statistical characteristics of waves in random media with space-time inhomogeneities (review). Radiophys Quantum Electron 30, 1–29 (1987). https://doi.org/10.1007/BF01034070
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DOI: https://doi.org/10.1007/BF01034070