天线组阵窄带低信噪比信号合成方法  

Synthesis Method of Narrowband Low SNR Signal of Antenna Array

作　　者：毛飞龙 焦义文 马宏 李冬 高泽夫 李超 孙宽飞 MAO Feilong;JIAO Yiwen;MA Hong;LI Dong;GAO Zefu;LI Chao;SUN Kuanfei(Department of Electronic and Optical Engineering,Space Engineering University,Beijing 101416,China;State Key Laboratory of Complex Electromagnetic Environment Effects on Electronics and Information System,Luoyang 471003,China)

机构地区：[1]航天工程大学电子与光学工程系,北京101416 [2]电子信息系统复杂电磁环境效应国家重点实验室,河南洛阳471003

出　　处：《无线电工程》2022年第9期1642-1648,共7页Radio Engineering

基　　金：北京市科技重大专项(Z181100002918004)。

摘　　要：针对天线组阵窄带信号合成方法中低信噪比条件下合成性能较差的问题,在传统天线组阵全频谱合成方法的基础上,加入正交下变频、低通滤波和抽取模块,采用频域互相关对合成方法进行优化。对采用传统方法与改进后方法的合成损失进行了仿真分析,使用旋转基线相位干涉仪进行了实测点频信号合成,验证了方法的正确性。验证结果表明,改进后的合成方法降低了低信噪比条件下(SNR∈[-20,-15]dB)天线组阵窄带信号的合成损失,提高了合成性能。To address the low performance of narrowband signal synthesis method for antenna array under low SNR,based on the traditional full spectrum synthesis method of antenna array,the optimized synthesis method adds orthogonal down-conversion,low-pass filtering and extraction module,and adopts frequency domain cross-correlation.The synthetic loss of the traditional method and the improved method is simulated and analyzed,and the experimental point frequency signal is synthesized by using the rotating baseline phase interferometer,which verifies the correctness of the method.Simulation and experimental analysis results show that the improved synthesis method reduces the synthesis loss of narrowband signal synthesis of antenna array and improves the synthesis performance under the condition of low SNR(SNR∈[-20,-15]dB).

关 键 词：天线组阵 低信噪比 窄带信号 频域合成 正交下变频 合成损失 

分 类 号：TN911[电子电信—通信与信息系统]