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- W4372347836 abstract "We consider the design of multiuser constellations for a multiple access channel (MAC) with K users, with M antennas each, that transmit simultaneously to a receiver equipped with N antennas through a Rayleigh block-fading channel, when no channel state information (CSI) is available to either the transmitter or the receiver. In full-diversity scenarios where the coherence time is at least T ≥ (K + 1)M, the proposed constellation design criterion is based on the asymptotic expression of the multiuser pairwise error probability (PEP) derived by Brehler and Varanasi in [1]. Although this PEP expression was previously considered intractable for optimization, in this work we derive a closed-form formula for its unconstrained gradient and perform Riemannian optimization in the Grassmannian manifold to design multiuser constellations for the MIMO MAC with state-of-the-art performance in terms of symbol error rate (SER)." @default.
- W4372347836 created "2023-05-07" @default.
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- W4372347836 date "2023-06-04" @default.
- W4372347836 modified "2023-10-02" @default.
- W4372347836 title "Noncoherent Multiuser Grassmannian Constellations for the Mimo Multiple Access Channel" @default.
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- W4372347836 doi "https://doi.org/10.1109/icassp49357.2023.10096720" @default.
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