Accession Number : ADA135859

Title :   Polarization Diversity Combining for Reduction of Angular Scintillation: Probability Density Function for a Two-Point-Scatterer Target.

Descriptive Note : Technical publication (Interim),


Personal Author(s) : Dinger,R J

PDF Url : ADA135859

Report Date : Jul 1983

Pagination or Media Count : 19

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)

Descriptors :   *Scintillation, *Radar targets, *Polarization, *Diversity reception, *Electromagnetic scattering, *Probability density functions, *Radar tracking, Glint, Correlation, Radar cross sections, Cross polarization, Coefficients, Monte Carlo method, Rayleigh waves, Simulation, Signals, Value, Echoes, Mean, Reduction, Scattering, Tracking, Distribution, Angles

Subject Categories : Statistics and Probability
      Active & Passive Radar Detection & Equipment
      Radiofrequency Wave Propagation

Distribution Statement : APPROVED FOR PUBLIC RELEASE