Effects of tuner IQ imbalance on multicarrier-modulation systems

Proceedings of the 2000 Third IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.00TH8474) Pub Date : 2000-03-15 DOI:10.1109/ICCDCS.2000.869880

M. Buchholz, Andreas Schuched, R. Hasholzner

{"title":"Effects of tuner IQ imbalance on multicarrier-modulation systems","authors":"M. Buchholz, Andreas Schuched, R. Hasholzner","doi":"10.1109/ICCDCS.2000.869880","DOIUrl":null,"url":null,"abstract":"After giving a short description of the underlying principles of orthogonal frequency division multiplexing (OFDM) as a representative of a multicarrier modulation (MCM) system, this paper sets the main emphasis on investigating the effects of IQ imbalance caused by the analog signal processing in the tuner. A mathematical description of the resulting distortions is given. Special attention is paid to the description in the frequency domain. This is the prevailing level of digital signal processing in OFDM receivers to extract useful information from the received signal. An OFDM 64 QAM (quadrature amplitude modulation) transmission chain according to the European DVB-T (terrestrial digital video broadcasting) standard has been simulated in order to evaluate the impact of the tuner imperfections on the constellation diagram and the bit-error rate (BER). In the framework of the DVB-T system possible strategies to equalize these imperfections are briefly suggested.","PeriodicalId":301003,"journal":{"name":"Proceedings of the 2000 Third IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.00TH8474)","volume":"62 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"24","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Proceedings of the 2000 Third IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.00TH8474)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ICCDCS.2000.869880","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}

引用次数: 24

Abstract

After giving a short description of the underlying principles of orthogonal frequency division multiplexing (OFDM) as a representative of a multicarrier modulation (MCM) system, this paper sets the main emphasis on investigating the effects of IQ imbalance caused by the analog signal processing in the tuner. A mathematical description of the resulting distortions is given. Special attention is paid to the description in the frequency domain. This is the prevailing level of digital signal processing in OFDM receivers to extract useful information from the received signal. An OFDM 64 QAM (quadrature amplitude modulation) transmission chain according to the European DVB-T (terrestrial digital video broadcasting) standard has been simulated in order to evaluate the impact of the tuner imperfections on the constellation diagram and the bit-error rate (BER). In the framework of the DVB-T system possible strategies to equalize these imperfections are briefly suggested.

查看原文本刊更多论文

调谐器IQ失衡对多载波调制系统的影响

本文简要介绍了以多载波调制(MCM)系统为代表的正交频分复用(OFDM)的基本原理，重点研究了调谐器中模拟信号处理引起的IQ不平衡的影响。给出了由此产生的畸变的数学描述。特别注意在频域的描述。这是从接收到的信号中提取有用信息的OFDM接收机中流行的数字信号处理水平。为了评估调谐器缺陷对星座图和误码率(BER)的影响，模拟了一种符合欧洲DVB-T(地面数字视频广播)标准的OFDM 64qam(正交调幅)传输链。在DVB-T系统的框架内，简要地提出了平衡这些缺陷的可能策略。

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

Proceedings of the 2000 Third IEEE International Caracas Conference on Devices, Circuits and Systems (Cat. No.00TH8474)

自引率

0.00%

发文量