Design Technique for Improved Bandwidth Moving Target Indicator Processors in Surface Radars

Abstract

A technique is presented for assigning the number and values of a set of transversal digital filter weights used with a moving target indicator filter to remove clutter. The approach involves a tradeoff between the amount of clutter rejection and useable bandwidth over which a moving target indicator filter satisfactorily passes a doppler signal; i.e., a specified detection probability is met or exceeded. The useable bandwidth is enhanced by an integrator which sums the B outputs from an N-tap, fixed window moving target indicator filter during a beam dwell of NB pulses. The procedure is applicable to any moving target indicator radar which employs a transversal moving target indicator filter and a reasonable number of returns/beam dwell. The narrow-band clutter example (Gaussian power spectrum, sigma = 5 Hz) indicates an improvement in useable bandwidth from the 62% achievable with 16 outputs from a conventional three-pulse canceller to 80.8% for five outputs from a nine-tap Chebyshev filter, while only reducing the clutter rejection from 92 to 69 dB.

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Document Details

Document Type
Technical Report
Publication Date
Jun 11, 1975
Accession Number
ADA014151

Entities

People

  • Donald W. Burlage
  • Ronald C. Houts

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Algorithms
  • Bandwidth
  • Broadband
  • Detection
  • Digital Filters
  • False Alarms
  • Filters
  • Frequency
  • Frequency Bands
  • Frequency Response
  • Ground Clutter
  • Integrators
  • Moving Target Indicator Radar
  • Moving Targets
  • Probability
  • Radar
  • Spectra

Readers

  • Phased Array Antenna Design.
  • Radar Systems Engineering.
  • Systems Analysis and Design