摘要
模态域波束形成方法由于将波束形成器分为独立的2个波束形成器,可更有效地设计高阶期望波束,因而得到了广泛的关注。分析了球体表面圆环阵模态域波束形成过程中的误差传递。推导研究了不同阶数下,波束形成中的阵元误差、混淆误差和测量噪声,并对各种误差进行了计算机仿真,从原理上为设计高阶声场传感器及其性能分析起到了指导作用。
The beamformer in mode space can be logically divided into a two-stage beamformer and scalability of the design to high mode order desired beam pattern, so much attention has been focused on this method. Error propagation for beamforming in mode space for a circular array mounted on a sphere is analyzed. A theoretical error analysis is developed where the separate effects of finite order, spatial aliasing, inaccuracies in sensor position, and measurement noise are investigated both theoretically and by simulations. The framework of analysis developed can therefore be useful in the design and performance analysis of high order sound field sensors.
出处
《电声技术》
2010年第10期69-72,共4页
Audio Engineering
关键词
模态域波束形成
误差分析
高阶声场传感器
beamforming in mode space
error analysis
high order sound field sensor
