摘要
针对压差型矢量水听器的直径波长比大于0.2时,利用它进行方位估计性能恶化的问题,提出一种修正的单个压差型矢量水听器多重信号分类(MUSIC)算法。修正方法通过修正压差型矢量水听器的阵列流型,提高了单个压差型矢量水听器MUSIC算法方位估计的估计精度,且在直径波长比大于0.2时依然保持较好的估计精度和稳健性。仿真结果表明,单个矢量水听器MUSIC算法相对于声强法在低信噪比时具有更好的方位估计性能,修正的压差型矢量水听器MUSIC算法在直径波长比大于0.2时依然具有良好的估计性能。湖上试验的数据处理结果进一步验证了单个压差型矢量水听器的修正MUSIC方位估计方法在实际系统中是有效的,且其估计性能优于原MUSIC方法。
The performance of direction-of-arrival （DOA） estimation of single pressure gradient vector hydrophone degrades rapidly when the diameter-wavelength ratio is more than 0.2. A modified MUSIC al- gorithm for single pressure gradient vector hydrophone is presented, which improves DOA estimation per- formance by optimizing the steering vector of the pressure gradient vector hydrophone. Simulation results indicate that the estimation performance of the MUSIC algorithm is better than that of the sound intensity method, and the modified MUSIC algorithm for single pressure gradient vector hydrophone has better esti- mation performance and robustness compared with MUSIC algorithm when the diameter-wavelength ratio is more than 0.2. The results of the lake trial powerfully testify the validity of the modified MUSIC algorithm for single pressure gradient vector hydrophone.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2014年第3期340-346,共7页
Acta Armamentarii
基金
国家自然科学基金项目(61001153)
山东省高等学校科技计划项目(J09LG08)
西北工业大学基础研究基金项目(JC20100223)
