Compensation for target speckle phase by use of the combination of the adaptive particle swarm optimization algorithm and the array detector method in heterodyne detection

Abstract This study presents a robust extension of a widely used array detector method for overcoming the speckle effect in active coherent detection. We consider the heterodyne frequency component of the total output of the array detector as the fitness function. The adaptive particle swarm optimization (APSO) algorithm is introduced into the array detector method to calculate the quantities of phase adjustment of each array element. Based on the numerical results, the proposed array detector model with APSO algorithm exhibits more efficient performance in compensation for the spatial speckle phase in optical coherent detection compared with other commonly used eight combinatorial optimization algorithms.