SOURCE LOCALIZATION IN A PARTIALLY KNOWN SHALLOW-WATER CHANNEL

The source localization in shallow water is beset with problems arisin g from the presence of a large number of correlated multipaths. Nevert heless, given a complete knowledge of the water channel it is definite ly possible to localize a source. A complete knowledge of the channel, however, is rarely available under most practical conditions. A new a pproach is proposed wherein the bottom reflection coefficients are not required; hence the bottom conditions need not be known. Further, bec ause of the use of signal subspace for localization, the proposed appr oach is robust against the background noise (-20 dB) and channel depth uncertainty (10 lambda). All these nice features of the proposed appr oach are possible only when the array size is large (>40 sensors). (C) 1995 Acoustical Society of America.