Impulse signal reconstruction using bi-receiver data

Abstract

Signal reconstruction is used widely in target identification and communication in underwater. A novel method for impulse signal reconstruction using the observed data of two receivers that are arranged in the same depth with a certain horizontal interval, is proposed in this talk. This method needs no a prior environmental information but the ranges between the source and the receivers. Although the Green's function depends on the range, frequency and on the source/receiver depth, the spectrum of signal is only dependent on the frequency. The waveguide invariant notion of shallow water provides a compensation mechanism between the frequency and range shift. According to this mechanism, the amplitudes and phases of Green function spectral ingredients can be extracted respectively. The impulse signal is then obtained by employing the deconvolution. The method is applied to the signal reconstruction of a high S/N ratio real data, the correlation coefficient between the reconstructed and original signals is over 0.95.