摘要
提出了基于扇区空域预滤波的微弱信号目标方位估计新方法,通过对传感器阵列接收数据进行扇区空域预滤波,抑制扇区以外的干扰和噪声,获得扇区内源信号相关的阵元域数据。应用虚部MUSIC方法对空域预滤波后的阵元域数据进行方位扫描,获得扇区内非对称信号源的方位信息,提高了系统对低信噪比信号的处理能力。计算机仿真结果表明,扇区空域预滤波后的虚部MUSIC方法,能有效地检测和分辨出偏离对称中心的低信噪比信号。
A new approach for weak signal in local area detection is present. Sector spatial prefiltering and image part high resolution algorithms are used. Firstly, the received data are prefiltered by sector spatial filter. Secondly, according to the characteristics of the noises distributing, image-part high resolution algorithm is used to scan the local area. Then, the signals azimuth is estimated by the spectrum of signals. Computer simulation indicates the availability of this approach.
出处
《电声技术》
2008年第11期30-34,38,共6页
Audio Engineering
基金
国家自然科学基金(10774119
10734030)
