Polar Format Algorithm for 3-D Imaging with Forward-Looking Synthetic Aperture Radar

Abstract

This report investigates the application of the polar format algorithm (PFA) to 3-D image formation using the forward-looking synthetic aperture radar system proposed by the US Army Combat Capabilities Development Command Army Research Laboratory with the goal to assist helicopter landing in degraded visual environments. The basic PFA is developed for this unusual radar sensing geometry, emphasizing some differences from the traditional side-looking SAR configuration. Several implementation details are discussed, such as sampling requirements, data interpolation, and the algorithm extension to multistatic antenna array. We then develop a procedure for wavefront curvature error correction (WCEC), starting with a thorough analysis of these phase errors and ending with a description of the WCEC algorithm implementation. At each stage along the way, we illustrate the theory with numerical examples.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 01, 2020
Accession Number
AD1111206

Entities

People

  • Traian Dogaru

Organizations

  • United States Army Combat Capabilities Development Command

Tags

Communities of Interest

  • Air Platforms
  • Sensors

DTIC Thesaurus Topics

  • Algorithms
  • Antenna Arrays
  • Boundaries
  • Cell Size
  • Computational Complexity
  • Convolution
  • Curvature
  • Data Processing
  • Geometry
  • Image Processing
  • Military Research
  • Radar
  • Radar Imaging
  • Signal Processing
  • Synthetic Aperture Radar
  • Three Dimensional
  • Two Dimensional

Fields of Study

  • Physics

Readers

  • Computer Science.
  • Maritime Combat Support and Expeditionary Logistics.
  • Radar Systems Engineering.