The sequential analysis application in the problem of estimation of stochastic channel impulse response

The great power of low-frequency large scale ocean acoustic tomography sources causes the problem of environmental pollution. Problems associated with the behavior of the ocean fish and animals require the acoustical power to be decreased. It is well known, that the necessary acoustical power can be decreased, if the accumulation on long time interval is used. In the ocean Doppler frequency variations and phase fluctuations are main the hindrances on the way of long interval signal accumulation. The first factor is the main in the dynamical tomography with the receiver on the drifting ship and the second one is principal in stationary systems. Optimal methods of signal processing allow to use the accumulation of match filtration results of broadband phase manipulated signals on the long time interval and decrease necessary acoustic source power. The demonstration of these methods is the aim of this article