Journal of Xidian University ›› 2022, Vol. 49 ›› Issue (2): 97-107.doi: 10.19665/j.issn1001-2400.2022.02.012

• Information and Communications Engineering • Previous Articles     Next Articles

Analysis of the outage performance of the cooperative V2X with the power-constrained CR-NOMA

QIAO Yuhang1(),ZHANG Liangmei1(),HE Yucheng1,2(),ZHOU Lin1,2()   

  1. 1. Xiamen Key Laboratory of Mobile Multimedia Communications,Huaqiao University,Xiamen 361021,China
    2. State Key Laboratory of Integrated Services Networks,Xidian University,Xi’an 710071,China
  • Received:2021-04-19 Online:2022-04-20 Published:2022-05-31
  • Contact: Yucheng HE E-mail:1878742207@qq.com;2574249614@qq.com;he_yucheng@163.com;linzhou@hqu.edu.cn

Abstract:

Considering the application of wireless information and energy transmission in the underlying cognitive non-orthogonal multiple access network of vehicles,a two-stage relay selection scheme for NOMA networks is proposed according to the statistical characteristics of NOMA networks when the secondary network is interfered by the primary network.In the first slot,the secondary network source node broadcasts superimposed signals to all relays using a fixed power allocation scheme,which is determined by the statistical characteristics of the channel quality of the second hop link.In the second slot,by selecting the optimal relay in two steps based on the signal received at the relay,the selected relay uses the power splitting scheme to perform the SWIPT,and the power collected is used only to forward the decoded signal with the energy consumption of coding and decoding not considered.Two secondary users use successive interference cancellation technology to decode the received superposed signals.At the same time the secondary users are interfered by the primary network signal.Under the limit of the interference temperature constraint,the approximate expression for the interruption probability of each secondary user is derived,and the correctness of the numerical analysis is verified.By analyzing the influence of system parameters on the interrupt probability of secondary users,it is proved that the TSRS scheme is superior to the existing system in improving the interrupt performance.

Key words: non-orthogonal multiple access, relay selection, cognitive radio, simultaneous wireless information and power transmission

CLC Number: 

  • TN911.22