{"title":"A USRP-based experimental testbed for OFDM systems impaired by I/Q imbalance","authors":"O. Ozdemir, R. Hamila, N. Al-Dhahir","doi":"10.1109/IEEEGCC.2013.6705757","DOIUrl":null,"url":null,"abstract":"In this paper, an experimental testbed for packet based OFDM systems is proposed using USRP RF front-ends. I/Q imbalance estimation and compensation algorithms are implemented at the receiver by manually injecting I/Q imbalance at the transmitter and/or at the receiver. RX I/Q imbalance compensation is implemented in the time domain while the TX I/Q imbalance compensation is implemented in the frequency domain using a two-tap equalizer for each pair of a subcarrier and its image. The experimental results show significant improvement due to I/Q imbalance compensation.","PeriodicalId":316751,"journal":{"name":"2013 7th IEEE GCC Conference and Exhibition (GCC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2013-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2013 7th IEEE GCC Conference and Exhibition (GCC)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IEEEGCC.2013.6705757","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 6
Abstract
In this paper, an experimental testbed for packet based OFDM systems is proposed using USRP RF front-ends. I/Q imbalance estimation and compensation algorithms are implemented at the receiver by manually injecting I/Q imbalance at the transmitter and/or at the receiver. RX I/Q imbalance compensation is implemented in the time domain while the TX I/Q imbalance compensation is implemented in the frequency domain using a two-tap equalizer for each pair of a subcarrier and its image. The experimental results show significant improvement due to I/Q imbalance compensation.
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