The influence of the principal parameters of optical chirp reversal devices on ability to restore signal wave form and pulse duration has been analysed and simulated.

This new way solves a great deal of correlation operation and condition judgment in a period, and finally succeeds in computing the relative position of each demodulation signal wave in a period.

After eliminates the effective zeros and saves the location information of these effective zeros of the signal wave, proposes and implements twice segmentations towards to the signature signal.