Figure 3

For the chirp \(u = e^{{ - \nu \pi x^{2} }} e^{{ - \iota \pi \lambda x^{2} }} ,\) the graph of mean square error in the fractional Fourier series approximation of exponential chirps for \(N = 3\) and (A) by taking \(\lambda = 0.75\) for various values of \(\nu\) (B) by taking \(\nu = \frac{1}{200\pi }\) for various values of \(\lambda\).