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Pulse Compression - Requirements

Pseudo Real Time Analysis Tool for the Full Scale Trials Fully Instrumented Radar Systems

A tool is required to enable full scale trials to compress their radar data whether a single pulse compression or a more complex 50% overlap of x pulses compression.

This tool needs to be developed to enable checking facility for radar data without having to record the data onto DCRSi tape, but could also be used to analyse the recorded data to check the functionality of the DCRSi tape recorder as well as the radar data.

The tool should be Windows based, running on either Windows NT or Windows 95.

As a priority, data checks/processing required are:

  • Radar Status Information Checks (Housekeeping)
    This information tells the analysis every thing about the radar setup and the data type.
  • Single Pulse Compression
    Simple Fourier transformation of a single raw radar pulse.
  • Multiple Pulse Compression ( x amount of pulses overlapped by 50%)
    More complex compression method of any amount of overlapped pulses that require phase correction between pulses before any Fourier transformation.

Further data checks/processing desirable are:

  • Pulse by Pulse Phase Analysis
    Check of phase stability between successive radar pulses.
  • Pulse by Pulse Jitter Analysis
    Check for any range jitter between successive radar pulses.
  • Signal to Noise Checks
    Using the radar equations and the raw radar data to check for the signal to noise ratio of the radar.
  • Radar Performance Analysis
    Check for total radar performance and validation.
  • Frequency Domain Analysis (ISAR Images)
    Create ISAR images from captured data.
  • Time Domain Analysis (Down Range Profiles)
    Stacked range profiles from captured data.

There is currently a working tool, that was developed for a single cell x pulses compression method that only operates on one range cell and only within the DOS environment. This should be used as a basis for forming an understanding of the data structure, and requirements of the problem.

In the final practical application, the capture of the radar data will be via a bought in card with driver software or a card specifically developed for this application. The radar data will be captured in a temporary store before being passed to the checking computer; around about 32 Mb of data should be collected enabling the radar data to be analysed.