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Implementation of the Single-Channel Pandora and Other Issues

Implementation of the Single-Channel Pandora and Other Issues

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The Pandora radar can be classified as a new class of target recognition radars for target identification well beyond visual range and can be slaved to a tracking radar or used as a surveillance radar in its own right. It is pointed out that target recognition is the primary quest for ultra-wide band radars. As yet there are massive technical problems that need to be overcome in this area, especially in the designing of cheap, high-power, extremely narrow pulse generators, while the Pandora appears already commercially viable. Hence, as target recognition radar, it will remain competitive for many years to come. It can also be used in a pulsed mode as a signal source for pulsed radar. This is possible, because of the parallel nature of the architecture. In such a mode, it can be used to generate large bandwidth step frequency signals or LFM many orders faster than is possible given the present state of technology. This will reduce Doppler smearing when tracking fast targets. In pulsed mode or CW mode, the Pandora is capable of superior performance in the presence of high target Doppler or own platform Doppler. Once the own Doppler is nulled (ODN), or at least brought down to a low value, it is possible to use it on fast flying platforms to carry out mapping activities, for example, airborne surveillance/planetary probes. This is because of the Doppler resilience of the LFM waveform. Such performance is difficult to obtain with relatively poor Doppler tolerant phase-coded signals.

Chapter Contents:

  • 9.1 Block Schematic of the Single-Channel Radar
  • 9.2 Digital Sweep Generator
  • 9.3 Sweep Upconverter
  • 9.4 Receiver Downconverter
  • 9.5 Local Oscillators
  • 9.6 Demonstration Model
  • 9.6.1 Pandora Veri?cation Measurements
  • 9.6.2 Measurement Procedures
  • 9.6.3 Salient Results
  • 9.7 Summary
  • 9.8 Conclusion

Inspec keywords: ultra wideband radar; signal sources; radar target recognition; Doppler shift; radar signal processing; pulse generators

Other keywords: extremely narrow pulse generators; LFM waveform; signal source; Doppler platform; airborne surveillance-planetary probes; ultrawideband radars; CW mode; target identification; surveillance radar; Doppler tolerant phase-coded signals; Doppler smearing reduction; single-channel Pandora radar; target recognition radars; tracking radar; bandwidth step frequency signals

Subjects: Radar equipment, systems and applications; Pulse generators; Signal processing and detection

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