Linear Time-Variant Space-Variant Filters and the WKB Approximation.

Abstract

Wave propagation in a random, inhomogeneous ocean is treated as transmission thru a linear, time-variant, space-variant, random communication channel. A consistent notation (vis-a-vis ad hoc), fundamental input-output relations, and various time-space transformations for both deterministic and random linear, time-variant, space-variant, filters are established. Using the method of separation of variables and the W.K.B. approximation, a time-invariant, space-variant, random transfer function of the ocean volume is derived. The ocean volume is characterized by a random index of refraction which is a function of depth. The index of refraction is decomposed into a deterministic component and a zero mean random component. In addition, two example calculations are made.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1983
Accession Number
ADA134886

Entities

People

  • L. J. Ziomek

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Space

DTIC Thesaurus Topics

  • Acoustics
  • Convolution Integrals
  • Electrical Engineering
  • Equations
  • Frequency
  • Geometry
  • Integrals
  • Reflection
  • Refraction
  • Refractive Index
  • Scattering
  • Signal Processing
  • Square Roots
  • Transducers
  • Transfer Functions
  • Wave Propagation
  • Waves

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Computer Networking
  • Statistical inference.

Technology Areas

  • Space