Accession Number : AD0785286

Title :   Moment Characterization of a Doubly-Spread Surface Scatter Channel at High and Low Rayleigh Parameters.

Descriptive Note : Technical rept.,

Corporate Author : YALE UNIV NEW HAVEN CONN DEPT OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s) : Tuteur,F. B. ; McDonald,J. F.

Report Date : AUG 1974

Pagination or Media Count : 39

Abstract : Many communication channels involving distortion due to random, time-variable surface scattering suffer from extremely acute time and frequency smear. This is particularly true for sonar propagation where Fresnel zones can be large and yet where Rayleigh parameters can also be quite high. Using a simple Fresnel corrected geometric optics model for the surface scatter channel it is possible to explain the unusually high degree of dispersive scattering observed. The scattering function for this channel is derived for an assumed Gaussian surface and several surface correlation-function models. Analyses are performed both for very large and very small Rayleigh parameters. (Modified author abstract)

Descriptors :   *Propagation, Scattering, Integral equations, Approximation(Mathematics), Surfaces

Subject Categories : Acoustic Detection and Detectors
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE