Ship Detection with Short Coherent Integration Time in Over-the-Horizon Radar

Abstract

To realize the ship detection with short coherent integration time (CIT) is an operational requirement for skywave over-the-horizon radar (OTHR). However, short CIT and the resulting low Doppler resolution cannot separate the ship from the close powerful ocean clutter. To resolve this problem, Fourier transform based clutter cancellation is proposed as well as some super-resolution spectral estimation techniques. In this paper, we still use clutter subtraction scheme but he clutter parameter estimation is improved by analyzing the Fourier phase information. As the result, the estimation accuracy is enhanced and better cancellation performance may be achieved, which to some extent will decrease the power and spreading of clutter residue and benefit the ship visibility and identification.

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Document Details

Document Type
Technical Report
Publication Date
Apr 14, 2005
Accession Number
ADA445244

Entities

People

  • Guo-sui Liu
  • Jin-lin Ni
  • Xin Guo

Organizations

  • Nanjing University of Science and Technology

Tags

Communities of Interest

  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Accuracy
  • Algorithms
  • Amplitude
  • Cancellation
  • Clutter
  • Data Rate
  • Detection
  • Discrete Fourier Transforms
  • Engineering
  • Errors
  • Estimators
  • Frequency
  • Frequency Bands
  • Over The Horizon Radar
  • Radar
  • Scattering
  • Time Domain

Fields of Study

  • Engineering

Readers

  • Image Processing and Computer Vision.
  • Radar Systems Engineering.