Resource Allocation for OFDM-based Multi-Destination Relay Networks with Direct Links

被引:0
|
作者
Liu, Xiaoyi [1 ]
Chen, Li [1 ]
Zhang, Xin [1 ]
Yang, Dacheng [1 ]
机构
[1] Beijing Univ Posts & Telecommun, Wireless Theories & Technol WT&T Lab, Beijing 100088, Peoples R China
关键词
multi-user; relay; OFDM; resource allocation; POWER ALLOCATION; JOINT SUBCARRIER; TRANSMISSION;
D O I
暂无
中图分类号
TM [电工技术]; TN [电子技术、通信技术];
学科分类号
0808 ; 0809 ;
摘要
In this paper, we study the joint resource allocation for the multi-destination amplify-and-forward relay network with direct source-to-destination links based on orthogonal frequency division multiplexing (OFDM) transmission. We aim to maximize the sum rate by jointly optimizing power allocation, subcarrier pairing, user assignment and transmission mode classification subject to the individual power constraints for the source and relay nodes. The optimization problem is solved based on dual method and a near-optimal joint resource allocation scheme is proposed. Besides, two sub-optimal schemes with reduced complexity are presented. Finally, simulation results show that the proposed near-optimal scheme outperforms other sub-optimal resource allocation schemes.
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页数:6
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