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- W1975738610 abstract "We propose a joint independent component analysis (ICA) based equalization and carrier frequency offset (CFO) estimation scheme for orthogonal frequency division multiple access (OFDMA) systems, which requires only a single pilot, resulting in a very low spectral overhead. On the one hand, a low-complexity ambiguity elimination method is proposed in the ICA equalized signals. By designing and exploring a fixed order of correlation in the transmitted signals, the permutation ambiguity problem is solved, while the remaining quadrant ambiguity is eliminated by one pilot symbol. One the another hand, linear CFO estimation is performed with a closed-form solution based on the phase difference between adjacent rows in the CFO-corrupted channel structure. Simulation results show that the proposed semi-blind ICA based scheme not only outperforms some existing CFO estimation approaches, but also provides a bit error rate (BER) performance, comparable to the ideal case with perfect channel state information (CSI) and no CFO." @default.
- W1975738610 created "2016-06-24" @default.
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- W1975738610 date "2014-12-01" @default.
- W1975738610 modified "2023-09-26" @default.
- W1975738610 title "ICA based joint semi-blind equalization and CFO estimation for OFDMA systems" @default.
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- W1975738610 doi "https://doi.org/10.1109/glocom.2014.7037338" @default.
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