Outage Performance of NOMA in Downlink SDMA Systems with Limited Feedback

被引：0
|
作者：
Yang, Qian [1 ]
Zheng, Tong-Xing [1 ]
Wang, Hui-Ming [1 ]
Deng, Hao [2 ]
Zhang, Yi [1 ]
Qiu, Xiayi [1 ]
Mu, Pengcheng [1 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Elect & Informat Engn, Minist Educ, Key Lab Intelligent Networks & Network Secur, Xian 710049, Shaanxi, Peoples R China
[2] Henan Univ, Sch Phys & Elect, Kaifeng 475004, Henan, Peoples R China
来源：
2017 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) | 2017年
基金：
中国国家自然科学基金;
关键词：
NONORTHOGONAL MULTIPLE-ACCESS; RELAY NETWORKS; CHANNELS; DESIGN; SUM;
D O I：
暂无
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this paper, the outage performance of non-orthogonal multiple access (NOMA) is investigated in a down-link space division multiple access (SDMA) network with a multi-antenna base station and randomly deployed users. The NOMA technology is concurrently exploited with SDMA to further improve spectral efficiency. With limited channel state information (CSI) feedback taken into account, an analytical framework is proposed to evaluate outage performance for a given user. An expression for the outage probability is derived in closed form. Moreover, the diversity order and the effect of the number of feedback bits on the outage performance of NOMA are analyzed. Numerical results are demonstrated to verify our analytical findings and show that different from the perfect CSI case there always exists performance floor in the considered network due to limited feedback.
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收藏
页数：6
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