Open AccessPower allocation under global and individual power constraints for full‐duplex relay networks
Author(s) -
Liu Yi,
Xu Xiaowei,
Ma Ying,
Zhang Hailin
Publication year - 2018
Publication title -
iet communications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.355
H-Index - 62
eISSN - 1751-8636
pISSN - 1751-8628
DOI - 10.1049/iet-com.2017.0476
Subject(s) - relay , power (physics) , computer science , constraint (computer aided design) , mathematical optimization , mathematics , physics , geometry , quantum mechanics
In this study, the authors propose a power allocation strategy for full‐duplex relay (FDR) networks, where two cases are considered according to whether the direct link is desired or not. The power allocation is studied in two scenes under the amplify‐and‐forward and decode‐and‐forward protocols, respectively. Aiming at maximising the system capacity, the authors derive the optimal power allocation strategy under the condition that the source and relay have the same maximum power constraint and the total power is limited. The effects of global and individual power constraints for FDR on system capacity are analysed. Simulations verify the theoretical analysis and indicate that the proposed power allocation strategy enhances the system performance greatly compared with uniform power allocation.