Polarization Diversity Combining for Reduction of Angular Scintillation: Probability Density Function for a Two-Point-Scatterer Target.
Abstract
The probability density function (PDF) for linear glint has been calculated for the situation in which the tracking angles derived from the co- and cross-polarized echoes are combined to produce an averaged tracking angle. A target consisting of two scattering centers, each producing an echo signal with a Rayleigh distribution, was assumed, and two methods of combining the tracking angles were investigated. The PDFs were generated usign a Monte Carlo simulation. The results show that combining the two tracking angles in this manner can reduce the fraction of the flint PDF falling outside the bounds of the target from 0.26 (the fraction when either echo is used by itself) to 0.11, if the co- and cross-polarized echoes are not correlated. If the echoes are correlated, the improvement varies linearly with the correlation coefficient between these two values. Combining using weighting of the derived tracking angle by the radar cross section in each echo produces a better improvement than simple averaging of the angles. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1983
- Accession Number
- ADA135859
Entities
People
- R. J. Dinger
Organizations
- Naval Air Weapons Station China Lake