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- W2901616982 abstract "This correspondence paper addresses linear precoding design for sum rate maximization in low-latency orthogonal frequency-division multiplexing systems. In order to mitigate the overhead of cyclic prefix (CP) originating from shortened symbol duration for low-latency communications, 5G wireless systems need to adopt short CP lengths. As channel delay spread must be less than the CP length, we first derive the effective root-mean-square (RMS) delay spread and the achievable rate using the zero-forcing assumption. We construct a sum rate optimization problem for each user subject to delay spread constraints and then convert the problem into a solvable convex problem along with a semi-definite relaxation technique. The precoding matrix is finally obtained by solving optimization problems for all users. Numerical results reveal that the proposed scheme attains superior performance to the conventional sum rate optimization, as well as small RMS delay spread." @default.
- W2901616982 created "2018-11-29" @default.
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- W2901616982 date "2018-12-01" @default.
- W2901616982 modified "2023-10-18" @default.
- W2901616982 title "Sum Rate Maximization With Shortened Cyclic Prefix in a MIMO-OFDM System" @default.
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- W2901616982 doi "https://doi.org/10.1109/tvt.2018.2876913" @default.
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