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• W2462743565 abstract "This paper considers a low-complexity Gaussian Message Passing Iterative Detection (GMPID) algorithm for Multiple-Input Multiple-Output systems with Non-Orthogonal Multiple Access (MIMO-NOMA), in which a base station with $N_r$ antennas serves $N_u$ sources simultaneously. Both $N_u$ and $N_r$ are very large numbers and we consider the cases that $N_u>N_r$. The GMPID is based on a fully connected loopy graph, which is well understood to be not convergent in some cases. The large-scale property of the MIMO-NOMA is used to simplify the convergence analysis. Firstly, we prove that the variances of the GMPID definitely converge to that of Minimum Mean Square Error (MMSE) detection. Secondly, two sufficient conditions that the means of the GMPID converge to a higher MSE than that of the MMSE detection are proposed. However, the means of the GMPID may still not converge when $ N_u/N_r< (sqrt{2}-1)^{-2}$. Therefore, a new convergent SA-GMPID is proposed, which converges to the MMSE detection for any $N_u> N_r$ with a faster convergence speed. Finally, numerical results are provided to verify the validity of the proposed theoretical results." @default.
• W2462743565 created "2016-07-22" @default.
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• W2462743565 date "2016-07-04" @default.
• W2462743565 modified "2023-09-30" @default.
• W2462743565 title "Gaussian Message Passing Iterative Detection for MIMO-NOMA Systems with Massive Access" @default.
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• W2462743565 doi "https://doi.org/10.48550/arxiv.1607.00800" @default.
• W2462743565 hasPublicationYear "2016" @default.
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