摘要
新一代无线通信、物联网和虚拟现实等领域对大带宽信号测试需求与日俱增,信号分析仪是用于研究信号频谱组成的主要工具。为提升信号分析仪的大带宽信号测试能力,本文首先研究设计了一种基于数字带宽交织的宽带信号采集系统;然后针对采集系统各通道增益不平衡及频带拼接导致带内频响恶化问题,提出了一种基于多载波测试联合最小二乘法设计补偿滤波器校正带内频响误差的方法。实测实验结果表明,设计的采集系统能有效提升信号分析仪分析带宽,带宽1.8 GHz的采集系统带内平坦度为±0.97 dB,相位线性度为±0.11 rad,带内频响误差校正效果优于主流方法频率采样法。
There is an increasing demand for large bandwidth signal testing in the fields of new generation wireless communication,internet of things and virtual reality,etc.Signal analyzers are the primary tool for studying the spectral composition of signal.To enhance the large bandwidth signal testing capability of signal analyzers,a wideband signal acquisition system based on digital bandwidth interleaving is studied and designed;aiming at the problem of deterioration of the in-band frequency response caused by the gain imbalance of each channel of the acquisition system and stitching of frequency bands,a method of correcting the in-band frequency response error by designing a compensation filter based on multi-carrier testing and the least squares method is proposed.The actual experimental results show that the designed system can effectively improve the signal analyzer’s analysis bandwidth.The in-band amplitude flatness of the 1.8 GHz bandwidth acquisition system is±0.97 dB,the phase linearity is±0.11 rad,and the in-band frequency response error correction effect is better than the mainstream method of frequency sampling method.
作者
李武
张鹏
万勇
张超
戴永寿
Li Wu;Zhang Peng;Wan Yong;Zhang Chao;Dai Yongshou(China University of Petroleum(East China),College of Oceanography and Space Informatics,Qingdao 266580,China;Ceyear Technologies Co.,Ltd.,Qingdao 266555,China)
出处
《电子测量技术》
北大核心
2024年第12期11-17,共7页
Electronic Measurement Technology
基金
国家自然科学基金(42274159)项目资助。
关键词
信号分析仪
分析带宽
数字带宽交织
带内频响误差校正
signal analyzer
analysis bandwidth
digital bandwidth interleaving
in-band frequency response error calibration
