標題: Optimal and Suboptimal Resource Allocations for Multi-Hop MIMO-OFDMA Networks
作者: Lin, Yuan-Bin
Wu, Wu-Hsiu
Su, Yu T.
傳播研究所
Institute of Communication Studies
關鍵字: MIMO-OFDMA;Decode-and-Forward;relay;multi-hop;resource allocation
公開日期: 2012
摘要: This paper considers the problem of resource allocation for weighted sum rate maximization in a decode-and-forward (DF) based multi-hop MIMO-OFDMA systems. The optimal solution of joint subcarrier assignment (user and relay selections) and power allocation is obtained by solving a dual problem. We derive the necessary conditions for the optimal power allocation and propose a suboptimal algorithm with a closed-form based general power allocation solution. This suboptimal algorithm, as numerical results verify that, suffers from minor performance loss against that achievable by the optimal solution when SNR is high. It is observed that the corresponding closed-form power allocation yields 8% performance gain when compared with the equal power allocation.
URI: http://hdl.handle.net/11536/20969
ISBN: 978-1-4673-2569-1
ISSN: 2166-9570
期刊: 2012 IEEE 23RD INTERNATIONAL SYMPOSIUM ON PERSONAL INDOOR AND MOBILE RADIO COMMUNICATIONS (PIMRC)
起始頁: 502
結束頁: 506
Appears in Collections:Conferences Paper