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The chirp signal is a simple sinusoidal wave that changes its frequency regularly over time.
For more information and for the generation of chirp signal you can use MATLAB signal processing Toolbox and simply type
>> help chirp
CHIRP Swept-frequency cosine generator.
Y = CHIRP(T,F0,T1,F1) generates samples of a linear swept-frequency
signal at the time instances defined in array T. The instantaneous
frequency at time 0 is F0 Hertz. The instantaneous frequency F1
is achieved at time T1. By default, F0=0, T1=1, and F1=100.
A Curious Thing: U.S. Radar Operators called "Chirp" the charateristic signal who was eared in headphones, because it was very similar to the Birds voice.
The chirp signal is one of the important signaling in radar for pulse compression. In LFM chirp, we have frequency modulation which the frequency of transmitted signal changes with time.
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