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- W2950331036 abstract "Grant-free random access (RA) with massive MIMO is a promising RA technique for massive access with low signaling overhead. In the grant-free RA with massive MIMO, preamble length has a critical impact on the performance of the system. In this paper, the optimal preamble length is investigated to maximize spectral efficiency (SE) of the grant-free RA with massive MIMO, where effects of the preamble length on the preamble collision and preamble overhead as well as channel estimation accuracy are taken into account. Simulation results agree well with our analyses and confirm the existence of optimal preamble length for SE maximization in the grant-free RA with massive MIMO. Moreover, properties of the optimal preamble length with respect to system parameters are revealed. Compared to the granted access, it is shown that longer preamble length is required for SE maximization in the grant-free RA." @default.
- W2950331036 created "2019-06-27" @default.
- W2950331036 creator A5028035987 @default.
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- W2950331036 date "2019-04-29" @default.
- W2950331036 modified "2023-09-28" @default.
- W2950331036 title "Optimal Preamble Length for Spectral Efficiency in Grant-Free RA with Massive MIMO" @default.
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- W2950331036 doi "https://doi.org/10.48550/arxiv.1905.00005" @default.
- W2950331036 hasPublicationYear "2019" @default.
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