.png){kind=icon}
返回
Adaptive Interference Alignment in Downlink Cellular Networks With Variable Data Rate Demand
.png){kind=icon}
PRE
AI
DOI：10.1109/TVT.2016.2518210.png)
.png){kind=icon}
原文求助.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
This paper proposes a new adaptive interference alignment ( AIA) scheme in downlink cellular networks. The AIA scheme first selects the degree of freedom ( DoF) mode from a set of feasible interference alignment ( IA) configurations in accordance with the asymmetric data rate demands fed back from mobile users, which enables base stations to schedule the DoFs among different users. We then derive a unified zero-forcing algorithm to implement perfect IA in closed form, which requires only the feedback of combined channel state information ( CSI) rather than that of both the desired and cross links. The proposed method shows good robustness in the case of limited feedback, where, regardless of feedback precision, intercell interference ( ICI) can be completely canceled. When data rate demand information is not available, we propose a suboptimal yet effective geometry-based power allocation algorithm ( GPA) for the AIA to maximize the sum rate. A two-user case study of power scheduling shows that the proposed Gerschgorin-disc-theory-based GPA significantly improves power efficiency and achieves a comparable sum rate to that of the waterfilling approach, even at a low signal-to-noise ratio.
Keyword:
Channel state information (CSI)
degree of freedom (DoF)
interference alignment (IA)
power scheduling
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
7.1
论文数:
1.8W
被引数:
6.6W
机构
引用论文
.png){kind=icon}
分享收藏Plant diversity and community composition of rice agroecosystems in Vietnam and the Philippines
PREAI
分享收藏
NUTRIENT MASS BALANCE FOR THE ALBEMARLE‐PAMLICO DRAINAGE BASIN, NORTH CAROLINA AND VIRGINIA, 19901
PREAI
分享收藏分享收藏
查看更多内容