Why do radars use pulses?

The amount of energy that can be delivered to a distant target is the product of two things; the peak output power of the transmitter, and the duration of the transmission. Therefore, pulse width constrains the maximum detection range of a target. Pulse width also determines the radar’s dead zone at close ranges.

What is pulse radar?

The most common type of radar signal consists of a repetitive train of short-duration pulses. In the figure the time between successive pulses is given as 1 millisecond (10−3 second), which corresponds to a pulse repetition frequency of 1 kilohertz (kHz). …

Why do we use pulse compression?

Pulse compression is a signal processing technique commonly used by radar, sonar and echography to increase the range resolution as well as the signal to noise ratio. This is achieved by modulating the transmitted pulse and then correlating the received signal with the transmitted pulse.

What is the difference between pulse radar and continuous wave radar?

A pulsed radar system typically provides greater measurement range compared to a CW radar, such as an FMCW radar system, with lower power consumption. But due to those continuous signals, CW radar systems are more easily detected than pulsed radar systems, especially those with shorter duty cycles.

What is main function of radar?

The basic principle of radar is to determine the range to an object or “target” by measuring the time required for an extremely short pulse of very high radio frequency, transmitted as a radio wave, to travel from a reference source (own ship) to a target and return as a reflected echo.

How does radar prevent blind speed?

Well, the target isn’t recognized as a moving target therefore. It flies with a so-called blind speed and the MTI system won’t report it like a ground clutter. The blind speed is dependent on the transmitted frequency and on the pulse repetition frequency of the radar unit.

What is Barker code in radar?

Barker codes are binary numbers using two to 13 bits and have unique auto-correlation functions. The points adjacent to the peak of the correlation function equal zero. This is very useful in a radar system since any spurious response can be misinterpreted as a target.

What is the difference in operation between a pulse radar and a pulse compression radar?

Pulse compression is a method for improving the range resolution of pulse radar. Pulse compression combines the energetic advantages of very long pulses with the advantages of very short pulses. The range resolution of a simple pulse-modulated radar depends on the pulse duration.

What are the three types of radar?

Different types of radar systems

1. Bistatic radar.
2. Continuous-wave radar.
3. Doppler radar.
4. Monopulse radar.
5. Passive radar.
6. Instrumentation radar.
7. Weather radars.
8. Mapping radar.

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