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- W2915354270 abstract "In this brief, a novel algorithm is proposed for timing and frequency synchronization and doubly selective channel (DSC) estimation in the uplink of orthogonal frequency division multiple access systems. By using a basis expansion model (BEM) to represent a DSC, a maximum likelihood approach is proposed to jointly estimate the timing and carrier frequency offsets of different users as well as the BEM coefficients of the time-varying channels. A space-alternating generalized expectation-maximization algorithm is then employed to transform the maximization problem for all users into several simpler maximization problems for a single user. Implementation issues are investigated and, the computational complexity and mean square error of the proposed scheme are evaluated. Performance assessment of the new scheme shows a significant improvement as compared with previous methods." @default.
- W2915354270 created "2019-03-02" @default.
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- W2915354270 date "2020-01-01" @default.
- W2915354270 modified "2023-09-24" @default.
- W2915354270 title "Timing and Frequency Synchronization and Doubly Selective Channel Estimation for OFDMA Uplink" @default.
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- W2915354270 doi "https://doi.org/10.1109/tcsii.2019.2901214" @default.
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