摘要
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。
The underwater acoustic target direction of arrival （DOA） estimation methods which using basic pursuit as reconstruct algorithm were slower in the process of computation. Considering the problem, a fast direction of arrival estimation method was proposed by analyzing the underwater target space sparsity, which utilizes the characteristics of compressed sensing framework of DOA. This method obtained the optimal solution through lo norm by reducing the parameters of the approximation gradually, then achieved the direction of arrival of underwater acoustic target. Simulation results compared the method performance with basic pursuit algorithm by different facets such as success rate, operation time, resolution, and showed that its success rate and resolution is roughly equal to the basic pursuit algorithm, but the computation time was reduced more.
出处
《声学学报》
EI
CSCD
北大核心
2014年第5期544-548,共5页
Acta Acustica
基金
国家自然科学基金(11204109
10904160)
江苏高校优势学科建设工程项目
江苏省高校自然科学基金(12KJB510003)资助
