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- W2079076870 abstract "In this paper, we study the codebook size design strategies in the multiple-input–multiple-output (MIMO) broadcast channel (BC) systems. We adopt the nonlinear Tomlinson–Harashima precoder (THP), which is designed by the imperfect channel direction information (CDI) acquired from the random vector quantization (RVQ) feedback mechanism. Under the limitation of the total feedback rate, we flexibly allocate the size of each user's codebook so that the overall channel capacity is maximized. Since the design problem is not convex, directly finding out the optimum allocation of codebook size is not attainable. However, by sophisticatedly using the discrete majorization theory, we can derive the codebook size allocation strategies for the high- and the low-signal-to-noise-ratio (SNR) regions. Interestingly, the results show that the equal size codebook is preferable in the low-SNR region, whereas the codebook allocates the whole available codebook size to a single user in the high-SNR region. Simulations certify the theoretical result of our design." @default.
- W2079076870 created "2016-06-24" @default.
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- W2079076870 date "2015-10-01" @default.
- W2079076870 modified "2023-09-24" @default.
- W2079076870 title "Codebook Size Design for RVQ-Based Tomlinson–Harashima Precoded MIMO Broadcast Channels" @default.
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- W2079076870 doi "https://doi.org/10.1109/tvt.2014.2367577" @default.
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