Time slot-split NOMA with resource allocation in full-duplex cooperative communications

被引：4

作者：

Wang, Xuan ^{[1
]}

Liu, Yi ^{[1
]}

Ma, Ying ^{[1
]}

Zhang, Hailin ^{[1
]}

机构：

[1] Xidian Univ, State Key Lab Integrated Serv Network, Xian 710071, Peoples R China

来源：

IET COMMUNICATIONS | 2021年 / 15卷 / 03期

基金：

中国国家自然科学基金;

关键词：

NONORTHOGONAL MULTIPLE-ACCESS;

D O I：

10.1049/cmu2.12078

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

This paper presents a time slot-split non-orthogonal multiple access (TSS-NOMA) scheme for full-duplex (FD) cooperative communication systems to improve resource utilisation. Aiming at the problem of low bandwidth efficiency when pairing users, TSS-NOMA divides a complete time slot into several parts to improve the pairing process. Users can occupy all bandwidths in different slots to reduce the waste of bandwidth resources. Unlike the scheme of forwarding a single signal, TSS-NOMA decodes the information symbols of relay, and re-encodes the messages through the new power allocation factors of successfully paired users. The hybrid symbols are sent to increase the proportion of central users' own signals received by themselves, thus improving the ergodic capacity of the system. To maximise the minimum achievable rate of the system, TSS-NOMA optimises the power allocation at the base station, and the relay. The performance of TSS-NOMA is verified by simulation, where numerical results show that this scheme can achieve higher spectral, and energy efficiency.

引用

页码：453 / 463

页数：11

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