Abstract
In this paper, an optimized simulated annealing algorithm is proposed for thinning and weighting large planar arrays in both far-field and near-field of underwater 3-D sonar imaging systems. This optimized algorithm is designed for the large planar array with a fixed sidelobe peak and a fixed current taper ratio under a narrowband excitation. It applies the approximation for time delay in the near-field beam pattern, and extends the simulated annealing algorithm to both far-field and near-field by defining a new “energy” function. One example of large planar array was used to evaluate the accuracy and efficiency of the optimized method.
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