Subcarrier Selection and Power Allocation for Amplify-and-Forward Relaying over OFDM Links

被引：27
|
作者：
Duval, O. [1 ,2 ]
Hasan, Z. [2 ]
Hossain, E. [3 ]
Gagnon, F. [1 ]
Bhargava, V. K. [2 ]
机构：
[1] Ecole Technol Super, Montreal, PQ H3V 1K3, Canada
[2] Univ British Columbia, Vancouver, BC V6T 1Z4, Canada
[3] Univ Manitoba, Winnipeg, MB R3T 2N2, Canada
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2010年 / 9卷 / 04期
关键词：
Cooperative communications; selective relaying; OFDM; power allocation; optimization;
D O I：
10.1109/TWC.2010.04.090950
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：
We study the end-to-end capacity of a cooperative relaying scheme using OFDM modulation, under power constraints for both the base station and the relay station. The relay uses an amplify-and-forward cooperative relaying technique to retransmit messages on a subset of the available subcarriers. The power used in the base station and the relay station transmitters is allocated in such a manner that the overall system capacity is maximized. The subcarrier selection and power allocation are obtained based on convex optimization formulations and an iterative algorithm. The proposed technique outperforms nonselective relaying schemes over a range of relay power budgets.
引用
收藏
页码：1293 / 1297
页数：5
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