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}, publisher={IEEE}, proceedings_a={CHINACOM2009-WCN}, year={2009}, month={11}, keywords={multihop system resource allocation system capacity.}, doi={10.1109/CHINACOM.2009.5339718} }- Wenyi Wang
Renbiao Wu
Year: 2009
Optimal Resource Allocation in OFDM Multihop System
CHINACOM2009-WCN
IEEE
DOI: 10.1109/CHINACOM.2009.5339718
Abstract
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.