Centralized and distributed resource allocation in OFDM based multi-relay system
Centralized and distributed resource allocation in OFDM based multi-relay system
复制标题
基于正交频分复用多中继系统的集中式和分布式资源分配
DOI：
10.1631/jzus.c0910405
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发表时间：
2010-05
期刊：
影响因子：
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中科院分区：
文献类型：
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在存在多个非再生中继的情况下，我们推导出最优的联合功率分配，中继选择，和子信道配对方案在正交频分复用（OFDM）的无线网络。采用拉格朗日对偶法设计优化算法。首先，建立了单中继系统的优化问题，通过求解对偶问题，给出了最优集中式算法。其次，以类似的方式提出了多中继系统的优化算法。与穷举搜索法相比，所提优化算法的计算复杂度由非多项式时间降低到多项式时间。最后，将集中式算法扩展到分布式算法，使其更适合于实际系统。仿真结果验证了我们的分析。
In the presence of multiple non-regenerative relays, we derived optimal joint power allocation, relay selection, and subchannel pairing schemes in orthogonal frequency division multiplexing (OFDM) based wireless networks. The Lagrange dual method was employed to design the optimal algorithm. First, the optimization problem was formulated for the single-relay system and the optimal centralized algorithm was presented by resolving the dual problem. Next, the optimal algorithm for a multi-relay system was proposed in a similar way. Compared with the exhaustive search method, the computational complexity of the proposed optimal algorithms was reduced from non-polynomial to polynomial time. Finally, the centralized algorithm was extended to the distributed algorithm, which was more feasible for the practical system. Simulation results verify our analysis.
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影响因子：
8.3
作者：
R. Cendrillon;Wei Yu;M. Moonen;Jan Verlinden;T. Bostoen
通讯作者：
R. Cendrillon;Wei Yu;M. Moonen;Jan Verlinden;T. Bostoen
影响因子：
16.4
作者：
Guoqing Li;Hui Liu
通讯作者：
Guoqing Li;Hui Liu
DOI：
10.1109/acssc.2000.910933
发表时间：
2000-10
期刊：
Conference Record of the Thirty-Fourth Asilomar Conference on Signals, Systems and Computers (Cat. No.00CH37154)
影响因子：
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作者：
D. Kivanç;Hui Liu
通讯作者：
D. Kivanç;Hui Liu
影响因子：
8.3
作者：
Yu, Wei;Lui, Raymond
通讯作者：
Lui, Raymond
DOI：
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发表时间：
2009
期刊：
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影响因子：
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作者：
R. Kwak
通讯作者：
R. Kwak