Subcarrier allocation based compensation for carrier frequency offset and I/Q imbalances in OFDM systems |
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| Authors: | Hai Lin Katsumi Yamashita |
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| Affiliation: | Department of Electrical and Information Systems, Osaka Prefecture University, 599-8531, Japan; |
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| Abstract: | We propose a novel subcarrier allocation (SCA) based approach for compensating carrier frequency offset (CFO) and I/Q imbalances in direct-conversion OFDM receivers. From the matrix representation of OFDM signals with CFO and I/Q imbalances, maximum likelihood CFO estimation and the associated SCA are given. Then, an SCA-based algorithm is proposed for the I/Q imbalances compensation. Moreover, the proposed approach is extended to a blind compensation scheme for OFDM signals with asymmetric SCA. |
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