数字发射机的误差矢量幅度仿真与分析

谭晓衡; 李腾蛟; 李玉闩

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数字发射机的误差矢量幅度仿真与分析

电气工程 | 更新时间：2023-11-28

- 数字发射机的误差矢量幅度仿真与分析
- Simulation and Analysis of the Digital Transmitter EVM
- 工程科学与技术 2009年41卷第5期页码：211-216
- 作者机构：
  
  1. 重庆大学通信与测控研究中心
  2. 重庆大学通信工程学院
- 作者简介：
- 基金信息：
  
  重庆市自然科学基金(2008BB2168)
- DOI：
  中图分类号：
- 纸质出版日期：2009，
  
  网络出版日期：2009-5-15，
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谭晓衡,李腾蛟,李玉闩.数字发射机的误差矢量幅度仿真与分析[J].工程科学与技术,2009,41(5):211-216.

TAN Xiao-heng, Li Teng-Jiao, Li Yu-Shuan. Simulation and Analysis of the Digital Transmitter EVM[J]. Advanced Engineering Sciences, 2009,41(5):211-216.
谭晓衡,李腾蛟,李玉闩.数字发射机的误差矢量幅度仿真与分析[J].工程科学与技术,2009,41(5):211-216. DOI：

TAN Xiao-heng, Li Teng-Jiao, Li Yu-Shuan. Simulation and Analysis of the Digital Transmitter EVM[J]. Advanced Engineering Sciences, 2009,41(5):211-216. DOI：

摘要

中文摘要: 如果能够准确而快捷地预测本振相位噪声和功率放大器非线性对数字发射机的误差矢量幅度(EVM)的恶化程度，以及采用EVM来快捷地预测系统误比特率（BER）性能，可为衡量现代数字通信系统性能提供一种新的可行手段。针对这一问题，首先推导了EVM与本振相位噪声、功率放大器的3阶交调失真(IMD3)之间的数学关系式，并提出了利用3阶交调失真(IMD3)来准确而快捷地预测功率放大器非线性对发射机EVM的恶化影响；其次推导出在同时存在相位噪声和功率放大器非线性时EVM的数学表达式；最后通过分析EVM与信噪比(SNR)之间的关系，获得了由EVM计算误比特率(BER)的数学公式。仿真结果表明：采用IMD3来预测功率放大器非线性对EVM的恶化，无需考虑输入输出功率、3阶截止点(IP3)和3阶交调产物等参数，为计算功放非线性引起的EVM提供了一种简单快捷的方法；使用EVM来预测系统的BER，能够大大节省传统BER测量方法所需的时间和闭环终端。

Abstract

Abstract:If the effects of the local oscillator (LO) phase noise and the power amplifier nonlinearity on the digital transmitter error vector magnitude (EVM) can be predicted easily and effectively

and the bit error rate (BER) can be predicted using the EVM

a new way will be provided to estimate the performance of the modern communication systems. In order to solve this problem

the relationships between EVM and two effects

LO phase noise and power amplifier nonlinearity

were derived and expressed separately. And the third order intermodulation distortion (IMD3) was used to simplify the expression of the EVM. Then

an expression for the EVM was derived based on the digital transmitter model that considers local oscillator phase noise and power amplifier nonlinearity. Finally

the math formula of bit error rate (BER) versus EVM

which can be easier and more useful to predict BER

was given. Through the simulation

it was found that a simple way was provided by using IMD3 to calculate EVM

without considering the input power

output power

3rd interception point and 3rd intermodulation product power. And predicting BER with the value of EVM can save the necessary closed loop equipment in the conventional method and shorten measure time.

关键词

误差矢量幅度相位噪声非线性三阶交调失真误比特率

Keywords

Error Vector Magnitude (EVM)Phase Noisenonlinearitythird-order intermodulation distortion (IMD3)bit error rate(BER)

references

王险峰.如何估算ACPR指标及交叉调制产物[J].国外电子元器件,2004(10)

吕海寰;蔡剑铭;甘仲民,卫星通信系统,北京:人民邮电出版社,1991.

Lin FL. ；Chuang HR. ；Chen SF.,Computer simulation of nonlinear effects of RF power amplifiers based on EVM and ACPR for digital wireless communications,Electronics Letters ,2000, 36(1).

Gharaibeh K M;Gard K G;Steer M B,Accurate estimation of digital communication system metrics-SNR,EVM and BER in a nonlinear amplifier environment,2004.

Shafik R A;Rahman M S;Islam A R,On the extended relationships among EVM,BER and SNR as performance metrics,Electrical and Computer Engineering,2006.

Ruifeng Liu ；Yongming Li ；Hongyi Chen ；Zhihua Wang,EVM estimation by analyzing transmitter imperfections mathematically and graphically,Analog Integrated Circuits and Signal Processing ,2006, 48(3).

范秀利,郑建宏,陈莉.TO-SCDMA的EVM测试及分析[J].重庆邮电学院学报(自然科学版),2005(2)

Apostolos Georgiadis,Gain, Phase Imbalance, and Phase Noise Effects on Error Vector Magnitude,IEEE Transactions on Vehicular Technology ,2004, 53(2).

Wett W T;Hanzo L;Steele R,Bandwith efficient QAM schemes for Rayleigh fading channels,1991.

Wang A K;Ligmanowski R;Castro J,EVM simulation and analysis techniques,2006.

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