2020/03/12 by Yong Liu, Wen Chen, Liu, Yong +1
Computer Science · Engineering · #Advanced MIMO Systems Optimization #Cooperative Communication and Network Coding #FOS: Electrical engineering #Full-Duplex Wireless Communications #Signal Processing (eess.SP) #electronic engineering #information engineering
paper · pdf · doi:10.48550/arxiv.2003.05642
openalex publication_date 2020/03/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
A limited feedback based dynamic resource allocation algorithm is proposed\nfor a relay cooperative network with Orthogonal Frequency Division Multiplexing\n(OFDM) modulation. A communication model where one source node communicates\nwith one destination node assisted by one half-duplex Decode-and-Foward (DF)\nrelay is considered in this paper. We first consider the \selective DF\nscheme, in which some relay subcarriers will keep idle if they are not\nadvantageous to forward the received symbols. Furthermore, we consider the\n\enhanced DF scheme where the idle subcarriers are used to transmit new\nmessages at the source. We aim to maximize the system instantaneous rate by\njointly optimizing power allocation and subcarrier pairing on each subcarrier\nbased on the Lloyd algorithm. Both sum and individual power constraints are\nconsidered. The joint optimization turns out to be a mixed integer programming\nproblem. We then transform it into a convex optimization by continuous\nrelaxation, and achieve the solution in the dual domain.\n