To evaluate the noise performance of the generated
frequency-chirped signal, cross-correlation between the generated
frequency-chirped pulse shown in Fig. 11(a) and the pulse
with an AWGN shown in Fig 12(a) is calculated. Note that the
SNR of the pulse with an AWGN is controlled to be –10 dB. The
cross-correlation is shown in Fig. 12(b). The cross-correlation
peak has an FWHM of about 24 ps, thus the compression ratio
is 23, which is identical to that without the AWGN.