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| Simultaneous estimation of time-delay and direction of arrival for underwater multitarget by using extended ESPRIT | |
| 摘 要： | 1ModelingTheemittedsignalisasinewavewithanenvelops(t).AnM-elementd-spaceduniformlinearsensorarrayisemployedasareceiver.Assumingthattherearepreflectorsunderwater.IfasingIeechowaveissampledwithNpointsintimedomain,thecomplexenvelopofreceivedechocanbewrittenasaNxMmatrixiwhereisthedirectionmatrix0fsensorarray,o(0i)={1,exp(-jwi),',exp-j(M-1)wil}"isi-thcolumn0fA(0),whichdenotesthedirecti0nvector0fsensorarray;wi=2Tdsin(0i)/A,i=1,2,')pisthespatia1frequency0fi-threflect0r,Aisthewavelengthofcarr… |
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