Scattering of a Code-Modulated Radio Signal and Associated Multipath Range Errors.

Abstract

To account for range errors obtained when a code-modulated radio signal is used to make range measurements in a scattering environment, a mechanism termed 'carrier cancellation' is proposed. This allows for destructive interference between several nearly direct path signals, leaving the possiblity for a weaker signal that has traveled over a longer path to predominate. A mathematical formulation of the phenomenon is given, and the equations derived are used for a computer simulation of the effects. The results of the simulation confirm that the proposed mechanism represents a viable explanation of the observed range errors. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1977
Accession Number
ADA047824

Entities

People

  • Eugene A. Margerum
  • Frederick W. Rohde

Organizations

  • Geospatial Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies
  • Space

DTIC Thesaurus Topics

  • Amplitude
  • Carrier Frequencies
  • Clocks
  • Computations
  • Computer Programs
  • Computer Simulations
  • Computers
  • Electromagnetic Radiation
  • Frequency
  • Mathematical Analysis
  • Modulation
  • Radio Signals
  • Radio Waves
  • Range Finding
  • Scattering
  • Shift Registers
  • Simulations

Readers

  • Plasma Physics.
  • Theoretical Analysis.
  • Wave Propagation and Nonlinear Chaotic Dynamics.