基于复包络提取的波束形成方法  

A beamforming method by extraction of complex envelope

作　　者：许小芳[1] 姜建平 朱安珏[1] 

机构地区：[1]中国科学院声学研究所东海研究站,上海200032 [2]广东湛江91388部队,广东湛江524022

出　　处：《声学技术》2009年第2期184-187,共4页Technical Acoustics

摘　　要：结合带通信号的特性,提出了一种基于复包络提取的波束形成方法。首先,提取各阵元接收的信号的同相分量和正交分量;其次,分别对上述同相分量和正交分量进行相移;最后再对移相之后的同相分量和正交分量进行延时相加,从而形成入射方向的波束。该方法有效降低了波束形成器的输入和输出采样率以及数字处理的复杂度。According to the characteristic of bandpass signal, a beamforming method by extraction of complex envelope is proposed This method contains three necessary processes to obtain complex envelope beam signals, namely, down conversion to in-phase and quadrature, phase rotation of in-phase and quadrature, time delay and sum of in-phase and quadrature after phase rotation. Then, the beam in the direction of an incidence angle is formed. The method can efficiently reduce the sampling rate and the complexity of digital processing.

关 键 词：波束形成 带通信号 复包络 时延 相移 

分 类 号：TB556[理学—物理]