Object ranging under seabed varying environment

Both the guide source signal and the object signal received by a vertical array are time separable.By correlating the two signals to construct a horizontal virtual array and combining with the waveguide invariant β,the range of object under seabed varying environment can be determined.With the wideband receiving array,locating an object source only needs little environment information.Compared with traditional match field processing(MFP),the complicated computation of match field is not needful and the requirement of environment parameters is reduced.So it is consistent with the concept of adaptive signal processing.In this paper,the theory and method of virtual receiving array is discussed.Through simulations and analysis of experimental data,the good result in determining object range can be obtained with an error of about 10%.