The constant information radar, or CIR, is a tracking radar that modulates target revisit time by maintaining a fixed mutual information measure. For highly dynamic targets that deviate significantly from the path predicted by the tracking motion model, the CIR adjusts by illuminating the target more frequently than it would for well-modeled targets. If SNR is low, the radar delays revisit to the target until the state entropy overcomes noise uncertainty. As a result, we show that the information measure is highly dependent on target entropy and target measurement covariance. A constant information measure maintains a fixed spectral efficiency to support the RF convergence of radar and communications. The result is a radar implementing a novel target scheduling algorithm based on information instead of heuristic or ad hoc methods. The CIR mathematically ensures that spectral use is justified.

Original languageEnglish (US)
Article number338
Issue number9
StatePublished - Sep 19 2016


  • Communications
  • Information
  • RF convergence
  • Radar
  • Shared spectrum

ASJC Scopus subject areas

  • Physics and Astronomy(all)


Dive into the research topics of 'The constant information radar'. Together they form a unique fingerprint.

Cite this