Accession Number:

ADA611638

Title:

Research Topics on Cluttered Environments Interrogation and Propagation

Descriptive Note:

Final rept. 15 Jul 2011-14 Jul 2014

Corporate Author:

CALIFORNIA UNIV IRVINE

Personal Author(s):

Report Date:

2014-11-04

Pagination or Media Count:

11.0

Abstract:

In the project we have derived new results for wave propagation in random and complex media and looked at specific applications associated with imaging and communication through a cluttered medium. The main new theoretical result is an explicit expression for the forth moment of the wave field in the scintillation regime which is relevant for instance for laser beam propagation through the turbulent atmosphere. This is important because it allows us to analyze statistical stability of imaging and communication schemes. We have used the results on the fourth moment to analyze wavefront correction schemes and obtained novel theoretical results that characterize the performance of these. We have also analyzed precursors that emerge in random media, in the beam regime, and how the frequency contents of the source governs the evolution of these. Moreover, we have analyzed how one can use the statistics of reflected or transmitted signals to infer information about the microstructure of the medium through which the signals has propagated. We have also generalized the concept of a Brewster angle associated with optimal transmission to the case with a random slab.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Optics
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE