摘要
关于水下声纳系统优化问题,由于声纳在水下经多路径传播和海水噪声,影响水听器定位效果。针对最小方差无失真响应(MVDR)算法的方位估计精度低和不能分辨相干声源的缺点,为提高DOA估计效率,提出了一种基于四元数模型的MVDR算法。将单个二维矢量水听器的输出表示为四元数,建立了四元数域MVDR算法的方位估计公式,并根据多重信号分类法的思想对四元数域MVDR算法进行了改进。四元数域MVDR算法和改进算法减少了的内存需求和计算复杂度。仿真结果表明,提高了方位估计精度和对相干声源的分辨能力,并证明了算法的有效性,对水下声纳方位估计具有一定的工程应用价值。
In order to improve Minimum Variance Distortionless Response （MVDR） algorithm＇ s performance of Direction Of Arrival （DOA） estimation accuracy and resolution ability of coherent sources, a quaternion based MVDR （Q-MVDR） algorithm was proposed. The outputs of a 2-D （2-Dimension） vector sensor were expressed as a qua- ternion algebra, and a DOA finding formula in quaternion domain was derived. Then, according to Multiple Signal Classification（MUSIC） algorithm＇ s principle, an improved version of quaternion MVDR algorithm was given. Com- pared with the traditional MVDR algorithm, the proposed MVDR algorithm and its improvement have a less memory requirement and computation complexity, and are robust to coherent sources. Analysis and simulation results verify the efficiency of the algorithm and its value in practical application.
出处
《计算机仿真》
CSCD
北大核心
2012年第11期162-165,共4页
Computer Simulation
基金
国家部委基金资助项目(4010709010201)
关键词
声矢量阵
MVDR
四元数
相干声源
Vector hydrophone array
MVDR
Quaternion
Coherent acoustic sources
