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A Detection Method for An OFDM Signal Distorted by I/Q Imbalance  

Park Kyung-won (중앙대학교 전자전기공학부 디지털통신 연구실)
Cho Yong-soo (중앙대학교 전자전기공학부 디지털통신 연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.30, no.1A, 2005 , pp. 37-45 More about this Journal
Abstract
In this paper, after analyzing the effect of I/Q imbalance in an OFDM system, the detection method of an OFDM signal distorted by I/Q imbalance is proposed. Also, the channel estimation and the pilot symbol design scheme are proposed for using the proposed detection method. Since I/Q imbalance in an OFDM system degrades the SIR and the BER(Bit Error Ratio) performance, the robust detection method is required for an OFDM system. the proposed detection method can effectively suppress the interference caused by I/Q imbalance using characteristics of an OFDM signal differently from the conventional method, and results in improving the SIR of a desired OFDM signal.
Keywords
OFDM; I/Q imbalance;
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