Additional Diversity Gain in OFDM Systems under the Influence of IQ Imbalances 


Vol. 31,  No. 12, pp. 1205-1213, Dec.  2006


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  Abstract

In this paper, we analyze the IQ(In-phase/Quadrature) imbalance effects at both transmitter and receiver side of OFDM(Orthogonal Frequency Division Multiplexing) and show that IQ imbalance is the parameter to improve the performance using ML and OSIC scheme. Especially, we can archive the diversity gain due to the IQ imbalance in multipath fading environment. In addition, new preamble format is proposed, which enable estimation of the channel and IQ imbalance parameters to maximize the diversity gain. Significant performance improvement is achieved by using the ML(Maximum Likelihood)and OSIC(Ordered Successive Interference Cancellation) with compensation compared to a standard receiver with no compensation for IQ imbalance and proposed channel estimation scheme achieves the better performance improvement than conventional.

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  Cite this article

[IEEE Style]

Y. Jin, J. Kwon, Y. Lee, J. Ahn, "Additional Diversity Gain in OFDM Systems under the Influence of IQ Imbalances," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 12, pp. 1205-1213, 2006. DOI: .

[ACM Style]

Younghwan Jin, Jihyeon Kwon, Yuro Lee, and Jaemin Ahn. 2006. Additional Diversity Gain in OFDM Systems under the Influence of IQ Imbalances. The Journal of Korean Institute of Communications and Information Sciences, 31, 12, (2006), 1205-1213. DOI: .

[KICS Style]

Younghwan Jin, Jihyeon Kwon, Yuro Lee, Jaemin Ahn, "Additional Diversity Gain in OFDM Systems under the Influence of IQ Imbalances," The Journal of Korean Institute of Communications and Information Sciences, vol. 31, no. 12, pp. 1205-1213, 12. 2006.

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pISSN : 1226 - 4717
eISSN : 2287 - 3880