基于小数量贴片天线的信号波达方向测试方法  

A Simple Estimation Method for Degree of Arrival Based on a Small Number of Patch Antennas

作　　者：侯天为 龚文飞[1] 赵起超 孙昕[1] HOU Tianwei;GONG Wenfei;ZHAO Qichao;SUN Xin(School of Electronic and Information Engineering,Beijing Jiaotong University,Beijing 100044,China)

机构地区：[1]北京交通大学电子信息工程学院,北京100044

出　　处：《传感器世界》2021年第9期21-28,共8页Sensor World

摘　　要：传统来波信号方向估计算法存在计算量大、工程实现难度高、阵子效率低的问题。为了解决上述问题,文章提出了一种利用小数量贴片天线的来波信号二维到达角估计方法。该方法利用比幅测向技术,按照天线排布将空间划分成3个区域,在每个区域建立空间查找表,对来波信号到达角精确估计。基于以上方法,文章用Matlab对空间不同方向到达的信号进行了仿真分析,估计误差在0.5°以内,估计时间相对于MUSIC算法显著提高,验证了该方法对来波信号方向估计的准确性与时效性。该方法可以应用于便携式终端,在民用方面为信号方向估计提供一种可行的方法。The conventional algorithms for estimating the direction of arrival(DoA)face several issues,such as impractical computational complexity,high difficulty for industrial applications,and low efficiency of antennas.In order to solve the above issues,the paper proposes a twodimensional DoA estimation method for incoming signals by using a small number of patch antennas.The method proposed in the paper uses the amplitude-comparison direction finding technique to divide the space into three areas according to the antenna arrangement,and establish a spatial searching table in each area to accurately estimate the DoA of the incoming signal.Based on the above method,the paper uses Matlab to simulate and analyze the signals arriving in different directions.The estimation error is within 0.5°,and the estimated time is significantly improved compared to the MUSIC algorithm,which verifies the accuracy and timeliness of the method for estimating the direction of the incoming signal.The proposed algorithm is applicable for the terminals,which provides a practical solution for signal processing.

关 键 词：贴片天线 比幅测向技术 二维测向 小数量天线 

分 类 号：TN911.23[电子电信—通信与信息系统]