Distributed CPU-less Functional Split Structure and Distributed Precoding Method for Cell-Free MIMO Structures 


Vol. 46,  No. 12, pp. 2123-2133, Dec.  2021
10.7840/kics.2021.46.12.2123


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  Abstract

This paper proposes a distributed CPU-less functional split structure between APs that are capable of fluidly communicating according to environment of User-Centric CF(Cell-free) MIMO in order to solve the problem of overload due to the high processing capacity in the Backhaul and capacity of Fronthaul where a lot of data comes and goes of the existing centralized CF MIMO system. At the same time, we propose a Precoding algorithm that can be calculated distributionally in each User-Centric cell suitable for the distributed structure. In addition, by using MATLAB, virtual CF MIMO communication environments were randomly created just by setting the density of the Access Point(AP) and the User Equipments(UE) and the number of APs cooperating with the User-Centric cell of each UE. in an environment with a certain width. and The precoding matrix was calculated using three methods: centralized MMSE precoding, a distributed MMSE precoding method that protects the entire UEs and a distributed MMSE precoding method that protects UEs in consideration of a protection range for each user-Centric cell. And the communication performance results are represented by CDF of SNR to verify the performance of the proposed distributed Precoding algorithm.

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  Cite this article

[IEEE Style]

H. Yoon and K. Choi, "Distributed CPU-less Functional Split Structure and Distributed Precoding Method for Cell-Free MIMO Structures," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 12, pp. 2123-2133, 2021. DOI: 10.7840/kics.2021.46.12.2123.

[ACM Style]

Hyun-sik Yoon and Kae-won Choi. 2021. Distributed CPU-less Functional Split Structure and Distributed Precoding Method for Cell-Free MIMO Structures. The Journal of Korean Institute of Communications and Information Sciences, 46, 12, (2021), 2123-2133. DOI: 10.7840/kics.2021.46.12.2123.

[KICS Style]

Hyun-sik Yoon and Kae-won Choi, "Distributed CPU-less Functional Split Structure and Distributed Precoding Method for Cell-Free MIMO Structures," The Journal of Korean Institute of Communications and Information Sciences, vol. 46, no. 12, pp. 2123-2133, 12. 2021. (https://doi.org/10.7840/kics.2021.46.12.2123)

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pISSN : 1226 - 4717
eISSN : 2287 - 3880