# A chirp signal is a sinusoid of continuously changing frequency. Chirps are frequently used to jam communication trans-missions. Consider the chirp (a) A measure of the frequency of the chirp is the so-called instantaneous frequency which is defined as the derivative of the phase in the cosine, i.e., IF(n) = d(Î¸n 2 )/dn. Find the instantaneous frequency of the given

Chapter 11, Problem #32

A chirp signal is a sinusoid of continuously changing frequency. Chirps are frequently used to jam communication trans-missions. Consider the chirp

(a) A measure of the frequency of the chirp is the so-called instantaneous frequency which is defined as the derivative of the phase in the cosine, i.e., IF(n) = d(Î¸n^{2} )/dn. Find the instantaneous frequency of the given chirp. Use MATLAB to plot x[n] for L = 256.

(b) Let L = 256 and use MATLAB to compute the DTFT of x[n] and to plot its magnitude. Indicate the range of discrete frequencies that would be jammed by the given chirp.

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