A New Scheduling Algorithm for Time-varying MIMO Channels with a Channel Aging Metric

被引：4
|
作者：
Hong, Minchul [1 ]
Hwang, Incheol [1 ]
Heo, Jehyun [1 ]
Hong, Daesik [1 ]
机构：
[1] Yonsei Univ, Sch EE Engn, Seoul 03722, South Korea
来源：
2023 IEEE 20TH CONSUMER COMMUNICATIONS & NETWORKING CONFERENCE, CCNC | 2023年
基金：
新加坡国家研究基金会;
关键词：
massive MIMO; scheduling; user selection; fast fading; channel aging; time-varying channel; channel correlation; MASSIVE MIMO;
D O I：
10.1109/CCNC51644.2023.10059856
中图分类号：
TP3 [计算技术、计算机技术];
学科分类号：
0812 ;
摘要：
In a wireless communication system, channel aging produces a mismatch between the estimated channel and the channel state at the time of data transmission. This mismatch enhances the interference to users and degrades system capacity. In this paper, we first define a channel aging metric (CAM) to reflect the influence of channel aging on user scheduling. We then propose a CAM-based semiorthogonal user scheduling (CAMSUS) algorithm that adaptively adjusts the number of serving users according to the user's CAM. Specifically, the CAMSUS algorithm reduces the number of serving users to mitigate intra-user interference (IUI) when channel aging is severe, and otherwise increases the number to increase the multiplexing gain. Simulation results show the proposed algorithm outperforms the SUS algorithm in a time-varying channel in terms of signal-tointerference-plus-noise ratio by 6-7 dB, and the achievable rate by 39-41%.
引用
收藏
页数：6
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