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- W2941508077 abstract "A novel pilot access scheme is presented to address the intra-cell pilot collision in crowded scenarios of massive multiple-input multiple-output with interleave-division multiple-access system. This scheme, termed identity-aided pilot access (IDPA), makes each user equipment (UE) transmit its identity number (ID) to the base station (BS), which makes its interleaver available at the BS according to the one-to-one correspondence between UE's ID and its interleaver. Then, the BS obtains the uplink message of the contenders selecting the same pilot by performing the multi-user detection, where the BS only needs to estimate the sum of contenders’ channel responses instead of each UE's channel response. Furthermore, we present a method of estimating the number of active UEs, based on which an access class barring factor is derived to reduce the traffic overload. We make an analysis on the uplink throughput of this IDPA scheme and the normalized root mean square error performance for the estimation about the number of active UEs. Numerical results verify the analytical results, and show that the IDPA scheme achieves extraordinary improvements in the uplink throughput." @default.
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- W2941508077 date "2019-06-01" @default.
- W2941508077 modified "2023-09-27" @default.
- W2941508077 title "User Identity-Aided Pilot Access Scheme for Massive MIMO-IDMA System" @default.
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- W2941508077 doi "https://doi.org/10.1109/tvt.2019.2912942" @default.
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