Abstract
We consider an OFDM-based multi-relay network in this letter, where a certain subcarrier pair can be forwarded by the source node and multiple relays to provide space diversity. A joint optimization scheme for power allocation (PA) and subcarrier pairing (SP) is proposed to maximize the total end-to-end transmission rate under a total power constraint. The optimization problem is simplified by introducing the definition of equivalent channel gain, and a new PA scheme based on the Cauchy-Schwarz inequality is provided in this letter. Then a suboptimal scheme, which can provide similar performance with lower computation complexity, is proposed. Simulation results show that the proposed schemes outperform other schemes with or without space diversity.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
