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提出了一种浅海声场单模闭环发射的最佳估计算法。通过对声场格林函数矩阵估计协方差的分析,设计了一种对格林函数矩阵作最佳估计的最佳发射阵权系数矩阵,此权系数矩阵为酉矩阵且各元素绝对值相等。基于此矩阵的单模发射算法可以使得单模激发过程以最快的速度收敛,并且发射稳定。算法的优势在模拟计算中得到了验证。最后给出了海上实验的结果,单模含量高达97%。
This paper presents a best estimation algorithm for single-mode closed-loop transmission in shallow sea acoustic field. By analyzing the covariance matrix of the Green’s function of acoustic field, this paper designs an optimal matrix of the matrix of emission parameters which can best estimate the Green’s function matrix. The weight coefficient matrix is a unitary matrix and the absolute values of the elements are equal. The single-mode emission algorithm based on this matrix can make the single-mode excitation process converge at the fastest speed and the emission is stable. The advantages of the algorithm have been verified in the simulation. Finally, the result of sea experiment is given. The single mode content is as high as 97%.