摘要
同频同时全双工(FD)通信由于其理论上可以提高一倍的频谱效率而获得了广泛关注。但是在全双工蜂窝网中,严重的小区间干扰极大地影响了系统性能。为了缓解严重的干扰,提高系统频谱效率,该文提出了一种部分全双工资源分配方案。该方案将时频资源划分为全双工资源块和半双工资源块,然后根据所服务用户的信道信息对时频资源进行分配,针对Wyner一维系统模型,将用户按其所处位置进行划分和资源分配,推导了不同划分门限下系统的频谱效率,得到了最优划分距离。仿真结果表明:相比完全全双工和完全半双工通信,部分全双工能够有效提高系统的频谱效率。
In-band full duplex (FD) communications are attracting more attention due to their potential to double the spectral efficiency (SE). However, severe inter-cell interference will degrade the system performance. A fractional FD (FFD) resource allocation strategy was developed to reduce the effect of severe interference in the system SE. The radio resources are first classified into FD resource blocks and half duplex resource blocks with all the blocks allocated to the users based on the channel condition of each user. The Wyner model was used to evaluate the system performance. The user positions were used to partition the resource blocks and as the user classification criterion. Simulate SE and optimal partition radii for different classification thresholds show that this method can significantly improve the system SE.
出处
《清华大学学报(自然科学版)》
EI
CAS
CSCD
北大核心
2017年第11期1190-1195,共6页
Journal of Tsinghua University(Science and Technology)
基金
国家“九七三”重点基础研究项目(2013CB329002)
国家自然科学基金青年基金(61201192)
清华-英特尔国际科技合作项目(20153000219)
科技部海峡两岸项目(2014DFT10320)
教育部科学技术研究重点资助项目(313005)
东南大学国家重点实验室开放研究基金项目(2012D02)
国家“八六三”高技术项目(2015AA01A701)
国家科技重大专项项目(2015ZX03001031-002)
清华大学自主科研项目(2015Z02-3)
关键词
全双工
半双工
资源分配
full duplex
halfduplex
resource allocation