A.Ya.Kal'uzhny On one method for analysis of signal reception efficiency in acoustic media with a multipath sound propagation and scattering |
Acoustic bulletin, Vol. 11 ¹ 1, (2008) |
| A universal method is proposed for evaluation of signal detection efficiency in media with complex propagation conditions for which the exact solving of the analysis problem is mathematically impossible. In particular, it allows the studying of the non-gaussian signal fluctuations due to scattering on the statistical inhomogeneities of the medium. The method is based on the asymptotic distribution of the non-negative random parameters for the extremal argument values. It is shown that for a wide class of processing algorithms the initial data may be reduced to two parameters: signal-to-noise ratio and scintillation index of the signal at processing output. The inaccuracy of the method is investigated for the traditional Rayleigh and Rician channels. The possibility of calculation accuracy control with use of the processing system parameters is shown. Practical application of the method is illustrated for the problem of detection efficiency analysis in the multipath acoustic channel with sound scattering on the statistical surface roughness. The technique for estimating of detection quality by a criteria of the threshold signal-to-noise ratio at signal source is proposed. Its advantages in comparison with a traditional criterion of a threshold signal-to-noise ratio at processing output are shown. |
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KEY WORDS: signal detection efficiency, signal-to-noise ratio, scintillation index of the signal, the Nakagami method |
| TEXT LANGUAGE: Russian |