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• W3037964275 abstract "In this paper, we propose an interference exploitation symbol-level precoding (SLP) method for multi-level modulations via an in-block power allocation scheme to greatly reduce the signaling overhead. Existing SLP approaches require the symbol-level broadcast of the rescaling factor to the users for correct demodulation, which hinders the practical implementation of SLP. The proposed approach allows a block-level broadcast of the rescaling factor as done in traditional block-level precoding, greatly reducing the signaling overhead for SLP without sacrificing the performance. Our derivations further show that the proposed in-block power allocation enjoys an exact closed-form solution and thus does not increase the complexity at the base station (BS). In addition to the significant alleviation of the signaling overhead validated by the effective throughput result, numerical results demonstrate that the proposed power allocation approach also improves the error-rate performance of the existing SLP. Accordingly, the proposed approach enables the practical use of SLP in multi-level modulations." @default.
• W3037964275 created "2020-07-02" @default.
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• W3037964275 date "2020-06-26" @default.
• W3037964275 modified "2023-09-23" @default.
• W3037964275 title "Symbol-Level Precoding Made Practical for Multi-Level Modulations via Block-Level Rescaling" @default.
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• W3037964275 doi "https://doi.org/10.48550/arxiv.2006.15245" @default.
• W3037964275 hasPublicationYear "2020" @default.
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