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Designing Cost- and Energy-Efficient Cell-free Massive MIMO Network with Fiber and FSO Fronthaul Links | ||
| AUT Journal of Electrical Engineering | ||
| مقاله 3، دوره 53، شماره 2، اسفند 2021، صفحه 159-170 اصل مقاله (1.77 M) | ||
| نوع مقاله: Research Article | ||
| شناسه دیجیتال (DOI): 10.22060/eej.2021.19273.5388 | ||
| نویسندگان | ||
| Pouya Agheli1؛ Mohammad Javad Emadi* 2؛ Hamzeh Beyranvand1 | ||
| 1Amirkabir University of Technology | ||
| 2Amirkabir university of technology | ||
| چکیده | ||
| The emerging cell-free massive multiple-input multiple-output (CF-mMIMO) is a promising scheme to tackle the capacity crunch in wireless networks. Designing the optimal fronthaul network in the CF-mMIMIO is of utmost importance to deploy a cost and energy-efficient network. In this paper, we present a framework to optimally design the fronthaul network of CF-mMIMO utilizing optical fiber and free space optical (FSO) technologies. We study an uplink data transmission of the CF-mMIMO network, wherein each of the distributed access points (APs) is connected to a central processing unit (CPU) through a capacity-limited fronthaul, which could be the optical fiber or FSO. Herein, we have derived achievable rates and studied the network's energy efficiency in the presence of power consumption models at the APs and fronthaul links. Although an optical fiber link has a larger capacity, it consumes less power and has a higher deployment cost than tan FSO link. For a given total number of APs, the optimal number of optical fiber and FSO links and the optimal capacity coefficient for the optical fibers are derived to maximize the system's performance. Finally, the network's performance is investigated through numerical results to highlight the effects of different types of optical fronthaul links. | ||
| کلیدواژه‌ها | ||
| Cell-free massive multiple-input multiple-output؛ capacity-limited optical fronthaul؛ achievable uplink rate؛ cost efficiency؛ and energy efficiency | ||
| مراجع | ||
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