chirp signal detection
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.