Howtosignalprocessing
- What is chirp bandwidth?
- How do you calculate chirp rate?
- Why chirp is used in radar?
- How does a chirp radar work?
What is chirp bandwidth?
The chirp bandwidth can be straightforwardly computed as the product of βr times the duration of the pulse, i.e., the chirp rate can be expressed as. (5.74) where Br is the transmitted bandwidth and Tp is the duration of the pulse. A linear instantaneous frequency results in a quadratic phase, i.e., (5.75) π π
How do you calculate chirp rate?
Chirp rate for a trapezoidal and raised-cosine pulse type is calculated as: Chirp Rate = Chirp Deviation / pulse width. The maximum Chirp Rate is 80 MHz/uSec: 80 MHz/uSec > Chirp Deviation / pulse width. For example, a pulse width of 0.1 uSec and a Chirp Deviation of 4 MHz has a Chirp Rate of 80 MHz/uSec.
Why chirp is used in radar?
The chirp pulse compression process transforms a long duration frequency-coded pulse into a narrow pulse of greatly increased amplitude. It is a technique used in radar and sonar systems because it is a method whereby a narrow pulse with high peak power can be derived from a long duration pulse with low peak power.
How does a chirp radar work?
Chirp radar works by adding a time delay to the receive signal and the swept frequency transmitted signal in such a way that the transmitted signal is “compressed” in time to yield a shorter pulse and the receive signal as the reverse operation is performed.
