Accession Number:

ADD015891

Title:

High Resolution Radar Profiling Using Higher-Order Statistics.

Descriptive Note:

Patent, Filed 26 Jun 92, patented 13 Jul 93,

Corporate Author:

DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s):

Report Date:

1993-07-13

Pagination or Media Count:

14.0

Abstract:

A coherent radar is used for achieving high resolution radar imaging of a moving object in sea clutter and noise. A stored replica of the transmitted waveform is combined with the returned signal in a synchronous detector to produce in-phase and quadrature I and Q or complex samples. High resolution is achieved by transmitting a series of pulses, each at a different frequency, and then processing these complex samples to produce a synthetic down-range profile. To enhance the radar target or object from system noise and sea clutter, the complex I and Q in-phase and quadrature component samples from the radar are coherently averaged in a special two-dimensional slice of the trispectrum e.g. quadruple product or fourth-order moment. This formulation of the fourth moment retains all important target information and suppresses Gaussian noise. Once averaged, a new set of I and Q samples are reconstructed that produce the same trispectral slice as this average. These reconstructed samples are then transformed using conventional Fourier transform methods to produce the average, or enhanced, down-range profile.

Subject Categories:

  • Active and Passive Radar Detection and Equipment
  • Numerical Mathematics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE