摘要
为了验证信号相位匹配原理的正确性,利用自制的16元线列阵,在水库进行了声源定向实验研究。分析了信号相位匹配原理的方位估计性能,并与MUSIC方法和常规波束形成方法的方位估计结果进行了比较;实验表明:由该原理定向的指向性半功率点开角是常规波束形成方法半功率点歼角的1／4-1／7和MUSIC方法的1／2-1／3。利用船舶航行噪声的多目标定向仿真和高分辨方位估计仿真结果表明:信弓相位匹配原理方位估计算法用于多目标方位估计和高分辨方位估计是可行的。
In order to verify the validity for signal phase matching principle, the experiments of DOA （Direction of Arrival） estimation are carried out at reservoir by using 16-sensor array. The performance of direction estimation by using signal phase matching principle was analyzed and compared with that by using MUSIC and Conventional Beamforming Methods （CBF）. The results show that the DOA estimation performance was better than that obtained by MUSIC and CBF methods, and that the 3 dB beam width obtained by Least Squares Method for Signal Phase Matching principle （LSMSPM） and Singular Value Decomposition for Signal Phase Matching principle （SVDSPM） is 1/4-1/7 as much as that obtained by CBF and 1/2-1/3 by MUSIC methods and the LSMSPM and SVDSPM are available for DOA estimation of multi-sources and for the super-resolution DOA estimation.
出处
《声学学报》
EI
CSCD
北大核心
2006年第6期488-495,共8页
Acta Acustica
基金
国家自然科学基金(60272077)
航空科学基金(02F53030)
陕西省科学基金(2002F17)资助项目
关键词
信号相位匹配原理
目标方位估计
定向实验
声源
形成方法
仿真结果
估计性能
估计算法
Acoustic arrays
Acoustic noise
Computer simulation
Impedance matching (acoustic)
Least squares approximations
Parameter estimation
Reservoirs (water)
Sensors
