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以基追踪为重构算法的水声目标波达方向估计方法在实际的应用中往往运算速度较慢,针对这一问题,在分析水声目标空间稀疏特性的基础上,结合压缩感知理论框架下波达方向估计的特点,提出一种快速水声目标波达方向估计方法。该方法通过逐步减小逼近参数的方式来得到l_0范数最优解,实现水声目标信号的波达方向估计。通过计算机仿真从成功率、运算时间、分辨角度等多个方面与基追踪算法进行比较分析,实验表明:在成功率和分辨角度上所提出算法与基追踪算法性能相当,但运算时间却仅仅是基追踪算法的1/11。
In order to solve this problem, based on the analysis of the sparse features of underwater acoustic targets, combined with the theory of compressed sensing, the method of underwater target DOA estimation based on the basis pursuit algorithm is often slow. The characteristics of the DOA estimation, a fast underwater acoustic target DOA estimation method is proposed. The method obtains the optimal l0 norm by gradually reducing the approximation parameters to achieve the DOA estimation of the underwater acoustic target signal. Through computer simulation, this paper compares and compares base-tracking algorithms with success rate, computing time and resolution. Experiments show that the algorithms proposed in this paper are similar in performance and resolution to those of base-tracking algorithms, but the computing time is only Base tracking algorithm 1/11.