IEICE Transactions on Communications

IEICE Transactions on Communications 2008 E91-B(3):814-820; doi:10.1093/ietcom/e91-b.3.814

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Copyright © 2008 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Papers -- Wireless Communication Technologies

Obtained Diversity Gain in OFDM Systems under the Influence of IQ Imbalance

Younghwan JIN¹, Jihyeon KWON¹, Yuro LEE¹, Dongchan LEE² and Jaemin AHN¹

¹ The authors are with Chungnam National University, Korea. E-mail: yhjin{at}cnu.ac.kr, ² The author is with A-Logics, Korea.

In this paper, we analyze the effects of IQ (In-phase/Quadrature-phase) imbalance at both transmitter and receiver of OFDM (Orthogonal Frequency Division Multiplexing) system and show that more diversity gain can be achieved even though there are unwanted IQ imbalance. When mixed sub-carriers within an OFDM symbol due to the IQ imbalance undergo frequency selective channels, additional diversity effects are expected during the demodulation process. Simulation results on the symbol error rate (SER) performance with ML (Maximum Likelihood) and OSIC (Ordered Successive Interference Cancellation) receiver show that significant performance gain can be achieved with the diversity gain caused by the IQ imbalance combined with the frequency selective channels.

Key Words: IQ imbalance, orthogonal frequency division multiplexing (OFDM), maximum likelihood (ML), estimation

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Manuscript received November 6, 2006. Manuscript revised October 2, 2007.

Reference

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This Article Abstract Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Add to My Personal Archive Download to citation manager Request Permissions Google Scholar Articles by JIN, Y. Articles by AHN, J. Social Bookmarking          What's this?