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• W2597166175 abstract "The presence of carrier frequency offset (CFO) and in-phase/quadrature-phase (I/Q) imbalance results in inter-carrier interference and thus greatly degrades the performance of orthogonal frequency division multiplexing (OFDM) systems. In this paper, we propose a new blind frequency synchronization scheme for OFDM systems with frequency-independent I/Q imbalance. A blind and joint estimator of CFO and I/Q imbalance parameter is first proposed by exploiting the multi-antenna redundancy at the receiver. Estimation computational complexity is reduced by expressing the cost function as a superposition of very few harmonically related cosine waves. The compensation for CFO and I/Q imbalance can be further carried out, which generates an equivalent received signal model without CFO and I/Q imbalance distortion. In this way, the conventional channel estimation and data detection can be performed. The Cramer-Rao bound of the CFO estimation is derived as a benchmark. The CFO estimation with frequency-dependent I/Q imbalance is further addressed. We also provide extensive simulations to demonstrate the superiority of the proposed method over existing competitors." @default.
• W2597166175 created "2017-03-23" @default.
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• W2597166175 date "2017-09-01" @default.
• W2597166175 modified "2023-10-18" @default.
• W2597166175 title "Blind Frequency Synchronization for OFDM Systems With I/Q Imbalance" @default.
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• W2597166175 doi "https://doi.org/10.1109/tvt.2017.2681665" @default.
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