Joint DOA and range Maximum Likelihood estimation based on L-shaped array for underwater targets
Spatial source localization has become one of the most important research areas in array signal processing and and plays a critical role in numerous engineering applications including radar,sonar,satellite communication,radio astronomy,medical diagnosis,earthquake remote sensing and so on.Traditional underwater source location technique can only acquire the depth and range information without direction-of-arrival(DOA)estimation.Aiming at this problem,in this paper,on the basis of the underwater acoustic propagation model,we make fully use of the inherent structure of L-shaped array and introduce the Maximum Likelihood(ML)technique into the underwater source localization,finally derive an efficient joint DOA and range Maximum Likelihood estimation algorithm based on horizontal L-Shaped array.Simulation results indicate that in the case of a single source and two closely spaced coherent sources,our proposed algorithm has sharper spatial spectrum peaks and lower sidelobe level,so the feasibility and validity of the proposed method is demonstrated.
L-shaped arrayunderwater propagationjoint DOA and range estimationMaximum Likelihood
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