Cooperative Spectrum Sharing in OFDM Two-Way Relay Systems With Bidirectional Transmissions

被引：13
|
作者：
Lu, Weidang [1 ]
Zhang, Yingjun [2 ]
Wang, Mengyun [1 ]
Liu, Xin [3 ]
Hua, Jingyu [1 ]
机构：
[1] Zhejiang Univ Technol, Sch Informat Engn, Hangzhou 311122, Zhejiang, Peoples R China
[2] Chinese Univ Hong Kong, Dept Informat Engn, Hong Kong, Hong Kong, Peoples R China
[3] Dalian Univ Technol, Sch Informat & Commun Engn, Dalian 116023, Peoples R China
来源：
IEEE COMMUNICATIONS LETTERS | 2017年 / 21卷 / 06期
基金：
中国国家自然科学基金;
关键词：
Bidirectional transmission; cooperative spectrum sharing; OFDM; subcarrier and power allocation; two-way relaying;
D O I：
10.1109/LCOMM.2017.2669960
中图分类号：
TN [电子技术、通信技术];
学科分类号：
0809 ;
摘要：
In this letter, we propose a cooperative spectrum sharing protocol, where both primary users (PUs) and secondary users (SUs) achieve bidirectional transmission. In particular, the SUs help PUs to achieve their bidirectional target rates through orthogonal frequency division multiplexing two-way relaying. In return, the PUs allow SUs to communicate bidirectionally on a subset of subcarriers. Subcarrier and power allocation are jointly optimized for both directions to maximize the SU data rate, given that the PUs' target rate is satisfied. Simulation results demonstrate a significant enhancement in spectrum efficiency compared with several benchmark schemes.
引用
收藏
页码：1349 / 1352
页数：4
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