Radar Frequencies and Waveforms
Pulse Compression Range response is the auto-correlation of the transmitted signal. To have “narrow” in range (time) domain, the waveform must have “wide” bandwidth in frequency domain The bandwidth of an unmodulated pulse of duration T p is 1/ T p Pulse Compression Use modulated pulses to get better range resolution. 25 2/T p
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A Comparative Analysis of Multiple Knife-Edge Diffraction ...
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www.its.bldrdoc.govFM-pulsed (chirped) Bm ≤ (Bc/t) 1/2, where B c = frequency sweep range during each pulse and t = emitted pulse duration (50% voltage). Example: If radar sweeps (chirps) across frequency range of 1.3 MHz during each pulse, and if the pulse duration is 55 μs, then Bm ≤ 154 kHz. CW Bm = 1 kHz; See sub-paragraph 4.2 of [1, Chapter 5] for RSEC
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