Waveform Design for Embedded Radar Communication Shannon D Blunt sdbluntittc'ku'edu Padmaja Yatham p

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Waveform Design for Embedded Radar
CommunicationShannon D Blunt (sdblunt_at_ittc.ku.ed
u) Padmaja Yatham (paddu_at_ittc.ku.edu)
Introduction

Radar

Ambient Illuminating Backscatter
Waveform


RF tag
/ Receiver
transponder Fig 1 Radar
System

• The goal is to communicate covertly in the
  presence of radar and yet have a relatively high
  data rate.
• Radar emissions have a dirty spectrum that
  bleed outside the passband.
• Covert communication signals ( or waveforms) are
  embedded in the radar back-scatter by means of a
  RF tag/transponder that lies within the
  illuminated area of the radar.
• Three design approaches have been developed to
  advantageously generate the communication
  waveforms.

Fig 2 Symbol error-rate for Weighted
combining
Fig 3 Measure of Obfuscation