K. Miyanaga, W. Lee, Akira Kato, S. Hirano, K. Ishida
{"title":"VCO gain nonlinearity calibration with frequency offset/drift compensation for 3G/GSM/EDGE polar modulation transmitter","authors":"K. Miyanaga, W. Lee, Akira Kato, S. Hirano, K. Ishida","doi":"10.1109/RWS.2011.5725420","DOIUrl":null,"url":null,"abstract":"In recent 3G cellular handset, small-sized RF is strongly demanded. Polar modulation is one of the candidates to eliminate peripheral RF components. To apply polar modulation for wideband application, high linearity of phase modulator is required. In this paper, VCO gain nonlinearity calibration for phase modulator is proposed. The proposed procedure can calibrate the nonlinearity including frequency offset and frequency drift, which have an impact on EVM performances. Simulation and measurement results show the proposal can achieve excellent EVM of 5.8%.","PeriodicalId":250672,"journal":{"name":"2011 IEEE Radio and Wireless Symposium","volume":"113 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2011-03-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2011 IEEE Radio and Wireless Symposium","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/RWS.2011.5725420","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 3
Abstract
In recent 3G cellular handset, small-sized RF is strongly demanded. Polar modulation is one of the candidates to eliminate peripheral RF components. To apply polar modulation for wideband application, high linearity of phase modulator is required. In this paper, VCO gain nonlinearity calibration for phase modulator is proposed. The proposed procedure can calibrate the nonlinearity including frequency offset and frequency drift, which have an impact on EVM performances. Simulation and measurement results show the proposal can achieve excellent EVM of 5.8%.
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