基于内插多相滤波的短波数字移相算法  

Short-wave Digital Phase Shift Aigorithm Based onInterpolation Polyphase Filtering

作　　者：朱凌刚 娄景艺 梁步阁[1] 杨德贵[1] ZHU Linggang;LOU Jingyi;LIANG Buge;YANG Degui(Radar Detection Guidance Laboratory,School of Aeronautics and Astronautics,Central South University,Changsha 410083,China)

机构地区：[1]中南大学航空航天学院雷达探测制导实验室,湖南长沙410083

出　　处：《无线电通信技术》2020年第4期480-484,共5页Radio Communications Technology

基　　金：国家重点研发计划(2018YFC0810202)。

摘　　要：数字移相技术是应用于数字波束成型(Digital Beam Forming,DBF)和短波相控阵天线阵列的重要技术之一。为克服传统延迟线移相受延迟线采样率限制导致移相精度不足的问题,提出了一种不受数字延迟线采样率限制、易于实现的数字移相算法,算法利用数字内插和多相滤波技术实现。通过Matlab仿真证明了该算法的有效性,该算法具有移相精度高、实时性能好的特点,可用于数字延时控制。Digital phase shifting technology is one of the important technologies applied to DBF(digital beamforming)and short wave phased array antenna arrays.In order to overcome the problem of inadequate phase shift accuracy caused by the limitation of the delay line sampling rate due to the traditional delay line phase shift,a digital phase shift algorithm that is not limited by the digital delay line sampling rate and is easy to implement is proposed.The algorithm uses digital interpolation and polyphase Filtering technology is implemented.The validity of the algorithm is proved by Matlab simulation.The algorithm has the characteristics of high phase shift accuracy and good real-time performance,and can be used for digital delay control.

关 键 词：短波通信 数字移相 信号内插 多相滤波 

分 类 号：TN911[电子电信—通信与信息系统]