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Pulsed Radar

Pulsed Radar

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Pulsed radar entails the transmission of a succession of radio frequency (RF) pulses. As noted in Chapter 1, pulse modulation enables the range of a target to be measured. Pulsed modulation also permits a high-power transmitter to be used, which helps achieve a long detection range. High transmitted powers can be used if the sensitive receiver can be isolated from the transmitted signal during the pulse. This is easily achievable in pulsed radars since electronic switches can be thrown to isolate the receiver from any input signals during the transmitted pulse. Once the transmitted pulse has died down, the switches open the receiver path. Hence, when the transmitter is on, the receiver is off, and when the transmitter is off, the receiver is on. This alternation also means that no echo returns can be received during the transmitted pulse and consequently that the radar is blind to targets at certain ranges.

Chapter Contents:

  • 3.1 Introduction to Pulse Parameters
  • 3.2 Peak and Average Power
  • 3.3 Pulse Delay Ranging
  • 3.4 Low PRF Radar
  • 3.5 Spectrum of Pulsed Radar
  • 3.6 Matched Reception
  • 3.7 Range Resolution
  • 3.8 Range Accuracy
  • 3.9 Pulse Compression

Inspec keywords: radar detection; pulse modulation; radar receivers; radar transmitters; radar signal processing

Other keywords: pulsed radar; radar detection; radar transmitter; radio frequency pulse; electronic switch; pulse modulation; radar signal processing; transmitted pulse; radar receiver; range measurement

Subjects: Modulation and coding methods; Radar equipment, systems and applications; Signal detection

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