Implement and traceability of adjustable EVM on ZigBee signal from vector signal generator

2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI) Pub Date : 2019-11-01 DOI:10.1109/ICEMI46757.2019.9101461

Zhang Zhiqiang, Yu Lei, Wang Yunling

{"title":"Implement and traceability of adjustable EVM on ZigBee signal from vector signal generator","authors":"Zhang Zhiqiang, Yu Lei, Wang Yunling","doi":"10.1109/ICEMI46757.2019.9101461","DOIUrl":null,"url":null,"abstract":"Error Vector Magnitude (EVM) is the most important parameter of modulation quality of wireless digital signal. At present, there are some shortcomings in the calibration process as follows: 1) Lack of vector signal generator that can accurately set the required EVM value of the standard signal, so when calibrating the vector signal analyzer, only the measurement points near the zero modulation error are calibrated. 2) Closed-loop inspection between instruments, using vector signal analyzer and vector signal generator to calibrate the EVM in a closed-loop way. According to the calculation formula of error vector magnitude on digital modulation signal from the vector signal generator, the setting value of I/Q amplitude imbalance and signal-to-noise ratio at a given EVM value of the ZigBee signal are calculated, in the meantime the vector signal analysis software built in the N9030A is used to measure the EVM of the ZigBee signal. The result shows good consistency. At the end of the article, the traceability of adjustments on I/Q amplitude imbalance and signal-to-noise ratio is introduced.","PeriodicalId":419168,"journal":{"name":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2019-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"2","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICEMI46757.2019.9101461","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 2

Abstract

Error Vector Magnitude (EVM) is the most important parameter of modulation quality of wireless digital signal. At present, there are some shortcomings in the calibration process as follows: 1) Lack of vector signal generator that can accurately set the required EVM value of the standard signal, so when calibrating the vector signal analyzer, only the measurement points near the zero modulation error are calibrated. 2) Closed-loop inspection between instruments, using vector signal analyzer and vector signal generator to calibrate the EVM in a closed-loop way. According to the calculation formula of error vector magnitude on digital modulation signal from the vector signal generator, the setting value of I/Q amplitude imbalance and signal-to-noise ratio at a given EVM value of the ZigBee signal are calculated, in the meantime the vector signal analysis software built in the N9030A is used to measure the EVM of the ZigBee signal. The result shows good consistency. At the end of the article, the traceability of adjustments on I/Q amplitude imbalance and signal-to-noise ratio is introduced.

查看原文本刊更多论文

基于矢量信号发生器的ZigBee信号可调EVM的实现及可追溯性

误差矢量幅度(Error Vector Magnitude, EVM)是无线数字信号调制质量的重要参数。目前在校准过程中存在以下不足:1)缺乏能够准确设定标准信号所需EVM值的矢量信号发生器，因此在校准矢量信号分析仪时，只对调制误差为零附近的测量点进行校准。2)仪器间的闭环检测，利用矢量信号分析仪和矢量信号发生器对EVM进行闭环校准。根据矢量信号发生器输出的数字调制信号误差矢量幅度的计算公式，计算出ZigBee信号给定EVM值下的I/Q幅值不平衡设定值和信噪比，同时利用N9030A内置的矢量信号分析软件对ZigBee信号的EVM进行测量。结果显示出较好的一致性。文章最后介绍了I/Q幅度不平衡和信噪比调整的可追溯性。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

2019 14th IEEE International Conference on Electronic Measurement & Instruments (ICEMI)

自引率

0.00%

发文量