A Multiuser Subcarrier and Power Allocation Scheme to Improve the Performance of Cell Edge Users

Jianwu Zhang; Fang Li; Fangmin Xu

doi:10.11959/j.issn.1000-0801.2015112

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A Multiuser Subcarrier and Power Allocation Scheme to Improve the Performance of Cell Edge Users

research and development | 更新时间：2024-06-05

- A Multiuser Subcarrier and Power Allocation Scheme to Improve the Performance of Cell Edge Users
- Telecommunication Science Vol. 31, Issue 5, Pages: 95-100(2015)
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- DOI：10.11959/j.issn.1000-0801.2015112
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- Published Online：2015-05，
  
  Published：20 May 2015
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Jianwu Zhang, Fang Li, Fangmin Xu. A Multiuser Subcarrier and Power Allocation Scheme to Improve the Performance of Cell Edge Users[J]. Telecommunication science, 2015, 31(5): 95-100.
DOI：

Jianwu Zhang, Fang Li, Fangmin Xu. A Multiuser Subcarrier and Power Allocation Scheme to Improve the Performance of Cell Edge Users[J]. Telecommunication science, 2015, 31(5): 95-100. DOI： 10.11959/j.issn.1000-0801.2015112.

摘要

在OFDMA系统中，小区边缘用户由于受到来自相邻小区的同频干扰，通信质量严重下降。有效地抑制小区间干扰，极大地提升无线网络性能尤其是小区边缘用户性能是5G移动通信系统的目标之一。基于速率自适应（RA）准则提出了一种提高小区边缘用户性能的子载波和功率的联合资源分配算法，该算法分为子载波分配和混合功率分配两步，在提高小区边缘用户性能的同时，最大化链路吞吐量。仿真结果表明，小区边缘用户吞吐量增益为25%以上，混合功率分配下的系统吞吐量逼近全部用户使用注水法时的系统吞吐量，并且降低了运算复杂度。

Abstract

In the OFDMA system，the communication quality of cell edge users decline seriously，due to the same frequency interference from the adjacent cells. To restrain the inter cell interference effectively and greatly enhance the performance of wireless networks especially the performance of cell edge users is one of the goals of 5G mobile communication system. Based on the rate adaptive（RA）criterion，a joint resource allocation algorithm to improve the performance of cell edge users was proposed. The algorithm was separated into two steps with subcarrier and hybrid power allocation respectively. The proposed scheme could maximize link capacity with the consideration of the performance of cell edge users. The simulation results show that the edge user throughput is greatly increased，the throughput of system of mixed power distribution approximation is approximate to the throughput that all users use liner water-filling algorithm. Besides，the proposed scheme reduces the computation complexity.

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references

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