Ambient Backscatter Communications over NOMA Downlink Channels

作     者：Weiyu Chen Haiyang Ding Shilian Wang Daniel Benevides daCosta Fengkui Gong Pedro Henrique Juliano Nardelli Weiyu Chen;Haiyang Ding;Shilian Wang;Daniel Benevides da Costa;Fengkui Gong;Pedro Henrique Juliano Nardelli

作者机构：College of Electronic Science and TechnologyNational University of Defense TechnologyChangsha 410073China College of Information and CommunicationNational University of Defense TechnologyXi’an 710106China Department of Computer EngineeringFederal University of CearáSobral 62010-560Brazil State Key Laboratory of Integrated Service NetworksXidian UniversityXi’an 710071China School of Energy SystemsLappeenranta University of TechnologyLappeenranta 53850Finland 

出 版 物：《China Communications》 (中国通信（英文版）)

年 卷 期：2020年第17卷第6期

页      面：80-100页

核心收录：

学科分类：080904[工学-电磁场与微波技术] 0810[工学-信息与通信工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080402[工学-测试计量技术及仪器] 0804[工学-仪器科学与技术] 081001[工学-通信与信息系统] 

基　　金：supported in part by the National Key R&D Program of China under Grant 2018YFE0100500 the National Natural Science Foundation of China under Grant 61871387,Grant 61861041,and Grant 61871471 the Natural Science Basic Research Program of Shaanxi under Grant 2019JM-019 Academy of Finland via:(a)ee-Io T project n.319009,(b)FIREMAN consortium CHIST-ERA/n.326270,and(c)Energy Net Research Fellowship n.321265/n.328869 the NUDT Research Fund under Grant ZK17-03-08 

主　　题：power-domain NOMA ambient backscatter communications IoT wireless-powered devices optimization 

摘      要：In this paper,we investigate the performance of commensal ambient backscatter communications(AmBC)that ride on a non-ortho go nal multiple access(NOMA)downlink transmission,in which a backscatter device(BD)splits part of its received signals from the base station(BS)for energy harvesting,and backscatters the remaining received signals to transmit information to a cellular ***,under the power consumption constraint at BD and the peak transmit power constraint at BS,we derive the optimal reflection coefficient at BD,the optimal total transmit power at BS,and the optimal power allocation at BS for each transmission block to maximize the ergodic capacity of the ambient backscatter transmission on the premise of preserving the outage performance of the NOMA downlink ***,we consider a scenario where the BS is restricted by a maximum allowed average transmit power and the reflection coefficient at BD is fixed due to BD’s low-complexity *** algorithm is developed to determine the optimal total transmit power and power allocation at BS for this ***,a low-complexity algorithm is proposed for this scenario to reduce the computational complexity and the signaling ***,the performance of the derived solutions are studied and compared via numerical simulations.