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• W2800887633 abstract "Accurate estimation and correction of channel distortions and carrier frequencyoffset (CFO) are of a great importance in any multicarrier communication system. Hence, in this paper, we propose data-aided CFO and channel estimationtechniques for both multiuser uplink and downlink of the generalized frequencydivision multiple access (GFDMA). Our proposed solutions jointly estimate theCFO and channel responses based on the maximum-likelihood criterion. To simplify the implementation of the proposed estimation algorithms, we suggest apreamble composed of two similar Zadoff-Chu training sequences in a generalized frequency division multiplexing block. It is worth mentioning that ourproposed technique can estimate both integer and fractional CFO values without any limitation on the acquisition range of CFO. In the uplink phase, eachuser aligns its carrier frequency with the base station using the estimated CFOin the downlink. However, the CFO estimates may get outdated for the uplinktransmission. Thus, residual CFOs may still remain in the received signal at thebase station. While being trivial in the downlink, CFO correction is a challenging task in the uplink. Thus, we also propose a joint CFO correction and channelequalization technique for the uplink of GFDMA systems. Finally, we evaluateour proposed estimation and correction algorithms in terms of estimation meansquare error and bit error rate performance through simulations." @default.
• W2800887633 created "2018-05-17" @default.
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• W2800887633 date "2018-05-04" @default.
• W2800887633 modified "2023-09-23" @default.
• W2800887633 title "Maximum-likelihood synchronization and channel estimation with multiuser detection in GFDMA" @default.
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• W2800887633 doi "https://doi.org/10.1002/ett.3424" @default.
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