相控阵组网测控同频中继射频自干扰抑制技术  

Radio frequency self-interference suppression technology for phased array networking tracking telemetering and command relay with co-frequency

作　　者：刘柳 刘田[2] 李洋[3] 潘文生 张琰 LIU Liu;LIU Tian;LI Yang;PAN Wensheng;ZHANG Yan(School of Telecommunications Engineering,Xidian University,Xi'an 710071,China;The 10th Research Institute of China Electronics Technology Group Corporation,Chengdu 610036,China;National Key Laboratory of Wireless Communications,University of Electronic Science and Technology of China,Chengdu 611731,China)

机构地区：[1]西安电子科技大学通信工程学院,陕西西安710071 [2]中国电子科技集团公司第十研究所,四川成都610036 [3]电子科技大学通信抗干扰全国重点实验室,四川成都611731

出　　处：《系统工程与电子技术》2025年第1期307-315,共9页Systems Engineering and Electronics

基　　金：国家自然科学基金重大仪器(42127802)资助课题。

摘　　要：针对相控阵同频中继节点在测控网络系统中自干扰问题,分析收发天线阵列分离情况下的自干扰信号特性。针对接收阵列天线合成后自干扰的特性,提出一种阵射频自干扰抑制方法。该方法根据阵面的布局以及不同规模子阵内自干扰信号的时延扩展,将一定时延扩展范围内的所有阵元等效为一个阵元,从而降低射频干扰抑制的分析复杂度。理论分析和仿真实验结果表明,射频干扰抑制技术在阵列天线中仍然能够实现自干扰抑制,性能与抽头个数强相关,且每个抽头的时延、相位以及幅度的范围选取与子阵划分相关。针对256阵元发射阵面和256阵元接收阵面的场景,仿真对比不同抽头数下的自干扰抑制性能。仿真结果表明,采用16个抽头对载波频率为26.8 GHz,带宽为200 MHz的自干扰信号抑制能力大于47 dB;实际测试结果表明,采用16个抽头进行自干扰射频重建,自干扰抑制能力大于32 dB。Aiming at the self interference problem of phased array co-frequency relay nodes in measurement and control network systems,the characteristics of self-interference signals under the condition of separated transmitting and receiving antenna arrays is analyzed.Focusing on the self-interference properties after the synthesis of the receiving array antenna,a radio frequency self-interference suppression method is proposed.This method,based on the array layout and the time delay spread of self-interference signals within different-sized subarrays,equates all array elements within a certain time delay spread range into a single element,thereby reducing the analytical complexity of radio frequency interference suppression.Both theoretical analysis and simulation experiments demonstrate that radio frequency interference suppression techniques can still achieve self-interference suppression in array antennas,with performance strongly correlated to the number of taps.The selection of each tap's delay,phase,and amplitude range is dependent on the subarray partitioning.For a scenario with a 256-element transmitting array and a 256-element receiving array,simulations comparing self-interference suppression performance under different tap counts reveal that employing 16 taps can suppress self-interference signals with a carrier frequency of 26.8 GHz and a bandwidth of 200 MHz by more than 47 dB.Practical test results indicate that using 16 taps for self-interference radio frequency reconstruction achieves a self-interference suppression capability exceeding 32 dB.

关 键 词：相控阵 组网测控 中继节点 同频中继 射频自干扰抑制 

分 类 号：V19[航空宇航科学与技术—人机与环境工程]