Please wait a minute...
Front. Inform. Technol. Electron. Eng.  2010, Vol. 11 Issue (6): 450-464    DOI: 10.1631/jzus.C0910405
    
Centralized and distributed resource allocation in OFDM based multi-relay system
Rui Yin1, Yu Zhang1, Guan-ding Yu*,1, Zhao-yang Zhang1, Jie-tao Zhang2
1 Department of Information Science and Electronic Engineering, Zhejiang University, Hangzhou 310027, China 2 Wireless Research Department, Huawei Technologies Co., Ltd., Shenzhen 518129, China
Download:   PDF(758KB)
Export: BibTeX | EndNote (RIS)      

Abstract  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.

Key wordsWireless relay network      Orthogonal frequency division multiplexing (OFDM)      Relay selection      Convex optimization      Dual method     
Received: 05 July 2009      Published: 02 June 2010
CLC:  TN914.51  
Fund:  Project  supported  by  the  National  Natural  Science  Foundation  of  China (No. 60802012), the National Basic Research Program (973) of
China (No. 2009CB320405), the Educational Commission of Zhejiang  Province,  China  (No.  20070234),  and  Huawei  Collaborative
Research Funding (No. YBWL2008046) 
Cite this article:

Rui Yin, Yu Zhang, Guan-ding Yu, Zhao-yang Zhang, Jie-tao Zhang. Centralized and distributed resource allocation in OFDM based multi-relay system. Front. Inform. Technol. Electron. Eng., 2010, 11(6): 450-464.

URL:

http://www.zjujournals.com/xueshu/fitee/10.1631/jzus.C0910405     OR     http://www.zjujournals.com/xueshu/fitee/Y2010/V11/I6/450


Centralized and distributed resource allocation in OFDM based multi-relay system

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.

关键词: Wireless relay network,  Orthogonal frequency division multiplexing (OFDM),  Relay selection,  Convex optimization,  Dual method 
[1] Fang-lin GU, Shan WANG, Wen-wu WANG. Standard-independent I/Q imbalance estimation and compensation scheme in OFDM direct-conversion transceivers[J]. Front. Inform. Technol. Electron. Eng., 2018, 19(3): 388-397.
[2] Zheng-min Kong, Guang-xi Zhu, Qiao-ling Tong, Yan-chun Li. A novel differential multiuser detection algorithm for multiuser MIMO-OFDM systems[J]. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 798-807.
[3] Yi Liu, Jian-hua Zhang, Wei Xu, Ze-min Liu. Statistical assessment of selection-based dual-hop semi-blind amplify-and-forward cooperative networks[J]. Front. Inform. Technol. Electron. Eng., 2010, 11(10): 785-792.