On the Energy Efficiency of Limited-Backhaul Cell-Free Massive MIMO
On the Energy Efficiency of Limited-Backhaul Cell-Free Massive MIMO
复制标题
有限回程无小区大规模 MIMO 的能量效率
DOI:
10.1109/icc.2019.8761134
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Bashar M
中科院分区:
文献类型:
--
作者:
Bashar M
We investigate the energy efficiency performance of cell-free Massive multiple-input multiple-output (MIMO), where the access points (APs) are connected to a central processing unit (CPU) via limited-capacity links. Thanks to the distributed maximum ratio combining (MRC) weighting at the APs, we propose that only the quantized version of the weighted signals are sent back to the CPU. Considering the effects of channel estimation errors and using the Bussgang theorem to model the quantization errors, an energy efficiency maximization problem is formulated with per-user power and backhaul capacity constraints as well as with throughput requirement constraints. To handle this non-convex optimization problem, we decompose the original problem into two sub-problems and exploit a successive convex approximation (SCA) to solve original energy efficiency maximization problem. Numerical results confirm the superiority of the proposed optimization scheme.
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DOI:
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发表时间:
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期刊:
ICC 2019 - 2019 IEEE International Conference on Communications (ICC)
影响因子:
--
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期刊:
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影响因子:
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DOI:
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期刊:
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影响因子:
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