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Diode-based IQ imbalance estimation in direct conversion transmitters
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Li, Wei, Xiong, Jian, Zhang, Yue, Wang, Jin, Huang, Li-ke and Maple, Carsten (2014) Diode-based IQ imbalance estimation in direct conversion transmitters. Electronics Letters, 50 (5). pp. 409-411. doi:10.1049/el.2013.3819 ISSN 0013-5194.
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Official URL: http://dx.doi.org/10.1049/el.2013.3819
Abstract
Direct conversion transmitters are widely used in wireless systems for their inherent features of being simple and low cost. In this architecture, the inphase (I branch) and quadrature signal (Q branch) will be unconverted to the RF frequency band by quadrature modulation. However, the drawback of the direct conversion architecture is that it is sensitive to IQ imbalance caused by the impairment of analogue devices in I and Q branches. It then results in interferences in mirror frequencies which degrades the signal quality. Therefore, the accurate measurement of IQ imbalance is crucial. A diode-based method to measure the broadband IQ imbalance is proposed which does not need additional measurement instruments. Measurement results show the effectiveness of this method.
Item Type: | Journal Article | ||||
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Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering | ||||
Divisions: | Faculty of Science, Engineering and Medicine > Engineering > WMG (Formerly the Warwick Manufacturing Group) | ||||
Library of Congress Subject Headings (LCSH): | Wireless communication systems, Diodes | ||||
Journal or Publication Title: | Electronics Letters | ||||
Publisher: | Institution of Engineering and Technology | ||||
ISSN: | 0013-5194 | ||||
Official Date: | 3 April 2014 | ||||
Dates: |
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Volume: | 50 | ||||
Number: | 5 | ||||
Page Range: | pp. 409-411 | ||||
DOI: | 10.1049/el.2013.3819 | ||||
Status: | Peer Reviewed | ||||
Publication Status: | Published | ||||
Access rights to Published version: | Restricted or Subscription Access | ||||
Date of first compliant deposit: | 8 November 2017 | ||||
Date of first compliant Open Access: | 8 November 2017 |
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