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Radar transmission frequency spectrum of a trapezoid pulse profile Recent advances in signal processing techniques have made the use of pulse profiling or shaping more common. By shaping the pulse envelope before it is applied to the transmitting device, say to a cosine law or a trapezoid, the bandwidth can be limited at source, with less ...
The pulse-repetition frequency (PRF) is the number of pulses of a repeating signal in a specific time unit. The term is used within a number of technical disciplines, notably radar. In radar, a radio signal of a particular carrier frequency is turned on and off; the term "frequency" refers to the carrier, while the PRF refers to the number of ...
Pulse-Doppler radar for aircraft detection has two modes. Scan; Track; Scan mode involves frequency filtering, amplitude thresholding, and ambiguity resolution. Once a reflection has been detected and resolved, the pulse-Doppler radar automatically transitions to tracking mode for the volume of space surrounding the track.
The AN/AWG-9 and AN/APG-71 radars are all-weather, multi-mode X band pulse-Doppler radar systems used in the F-14 Tomcat, and also tested on TA-3B. [1] It is a long-range air-to-air system capable of guiding several AIM-54 Phoenix or AIM-120 AMRAAM missiles simultaneously, using its track while scan mode.
Very high frequency (VHF) two-frequency long range early warning radar: General Electric: AN/FPS-26: Height finder radar: AN/FPS-27: S-band Frequency Diverse (FD) search radar: Westinghouse Electronics: AN/FPS-30: Long range early warning radar: AN/FPS-35: Frequency diverse long range air defense search radar: Sperry Corporation: AN/FPS-41: S ...
AN/APS-145 improved AN/APS-139 pulse-Doppler ultra high frequency surveillance radar by General Electric for E-2 Hawkeye [77] AN/APS-146 Derivative of AN/APS-130 for the cancelled EA-6B Prowler upgrade; AN/APS-147 improved AN/APS-143 Multi-Mode X-Band Maritime Surveillance Radar with Integrated IFF Interrogator by Telephonics for MH-60R Seahawk
Pulse Doppler radar may have 50 or more pulses between the radar and the reflector. Pulse Doppler relies on medium pulse repetition frequency (PRF) from about 3 kHz to 30 kHz. Each transmit pulse is separated by 5 km to 50 km distance. Range and speed of the target are folded by a modulo operation produced by the sampling process. True range is ...
Pulse-Doppler radar sensors are therefore more suited for long-range detection, while FMCW radar sensors are more suited for short-range detection. Monopulse : A monopulse feed network, as shown in Fig. 2, increases the angular accuracy to a fraction of the beamwidth by comparing echoes, which originate from a single radiated pulse and which ...