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Anokye, Prince; Ahiadormey, Roger Kwao; Jo, Han-Shin; Song, Changick; Lee, Kyoung-Jae
IEEE transactions on wireless communications, 2020-Aug., 2020-8-00, 20200801, Letnik: 19, Številka: 8Journal Article
This paper studies the spectral/energy efficiency (SE/EE) of a heterogeneous network with the backhaul enabled by low-resolution analog-to-digital converters (ADCs) quantized full-duplex massive multiple-input multiple-output (MIMO) over Rician channels. Backhaul communication is completed over two phases. During the first phase, the macro-cell (MC) base station (BS) deploys massive receive antennas and a few transmit antennas; the small-cell (SC) BSs employ large-scale receive antennas and a single transmit antenna. For the second phase, the roles of the transmit and receive antennas are switched. Due to the low-resolution ADCs, we account for quantization noise (QN). We characterize the joint impact of the number of antennas, self-interference, SC-to-SC interference, QN, and Rician <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula>-factor. For the first phase, the SE is enhanced with the massive receive antennas and the loss due to QN is limited. For the second phase, the desired signal and QN have the same order. Therefore, the SE saturates with the massive transmit antennas. As the Rician <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula>-factor increases, the SE converges. Power scaling laws are derived to demonstrate that the transmit power can be scaled down proportionally to the massive antennas. We investigate the EE/SE trade-offs. The envelope of the EE/SE region grows with increase in the Rician <inline-formula> <tex-math notation="LaTeX">K </tex-math></inline-formula>-factor.
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