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In this letter, we consider the downlink wireless energy transfer as the sole source of power to support uplink data transmission in a multiuser massive multiple-input multiple-output (MIMO) system. The asymptotically optimal closed-form downlink power allocation strategy is derived to maximize the uplink sum rate using matched filter-based beamforming. Moreover, it is interesting to find that the...
This paper considers a multi-cell network with base stations (BSs) equipped with large dual-polarized antenna arrays. We derive closed-form expressions of network performance in terms of user signal-to-interference-and-noise ratio both with perfect channel state information and in the presence of pilot contamination. In general, a dual-polarized system enjoys the reduction in pilot contamination and...
Pilot contamination has become a main constraint for large-scale multi-input multi-output (MIMO) systems. In this paper, we consider a large-scale multi-cell MIMO where the number of users per cell K is proportional to that of base station antennas M. Both performances with and without pilot contamination are analyzed in a quantitative way with closed-form expressions. Unlike some existing works,...
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