ChinaCom2009-Wireless Communications and Networking Symposium

Research Article

Optimal Resource Allocation in OFDM Multihop System

  • @INPROCEEDINGS{10.1109/CHINACOM.2009.5339718,
        author={Wenyi Wang and Renbiao Wu},
        title={Optimal Resource Allocation in OFDM Multihop System},
        proceedings={ChinaCom2009-Wireless Communications and Networking Symposium},
        keywords={multihop system resource allocation system capacity.},
  • Wenyi Wang
    Renbiao Wu
    Year: 2009
    Optimal Resource Allocation in OFDM Multihop System
    DOI: 10.1109/CHINACOM.2009.5339718
Wenyi Wang1,*, Renbiao Wu1,*
  • 1: Tianjin Key Lab for Advanced Signal Processing, Civil Aviation University of China, Tianjin
*Contact email:,


OFDM multihop system is efficient scheme to save energy and extend coverage. In this paper, optimal resource allocation in OFDM multihop system, including arbitrary number of hops and subcarriers, is studied. By joint subcarrier matching and power allocation, our goal is to maximize system capacity with the system-wide power constraint. First, we formulate the optimal subcarrier matching and power allocation problem as an optimization problem, which is a mixed binary integer programming problem and prohibitive to find the global optimum. Then, by utilizing the special structure of the system, we propose a low complexity resource allocation scheme, which is proved to be globally optimal. The simulations prove that the proposed scheme improves the system capacity.