基于稀疏阵元阵列的LFM-Capon自适应波束形成的声学成像技术分析  

Analysis of Acoustic Imaging of LFM-Capon Adaptive Beamforming Based on Sparse Array

作　　者：黄兆宇 蔡玉雷 HUANG Zhaoyu;CAI Yulei(Unicom(Jiangsu)Industrial Internet Co.,Ltd.,Jiangsu 210044,China;Jiangsu Yidong Information Technology Co.,Ltd.,Jiangsu 210044,China)

机构地区：[1]联通(江苏)产业互联网有限公司,江苏210044 [2]江苏颐东信息技术有限公司,江苏210044

出　　处：《电子技术（上海）》2024年第4期10-13,共4页Electronic Technology

摘　　要：阐述超声成像技术凭借其无损、原理简单等特点被广泛应用在各行各业的检测中,但是超声成像的质量还有待提高,尤其是横向分辨率。为此,提出一种基于伪随机码调制线性调频信号和稀疏线性阵列的自适应波束形成超声成像方法,将编码激励技术与Capon算法结合,采用具有脉冲压缩性能的发射信号,对Capon自适应波束形成方法进行改进。仿真结果表明,该方法可以提高成像的对比度和空间分辨能力。This paper describes that ultrasonic imaging technology has been widely used in the detection of all walks of life with its characteristics of nondestructive and simple principle,but the quality of ultrasonic imaging needs to be improved,especially the horizontal resolution.It proposes an adaptive beamforming ultrasonic imaging method based on pseudo-random code modulated linear frequency modulation signal and sparse linear array.The Capon adaptive beamforming method is improved by combining the encoding excitation technique with the Capon algorithm and using the transmitted signal with pulse compression performance.Simulation results show that this method can improve the contrast and spatial resolution of imaging.

关 键 词：超声成像 MIMO稀疏阵列 编码调制LFM 自适应波束形成 

分 类 号：TN957.51[电子电信—信号与信息处理] TB559[电子电信—信息与通信工程]