文献详情
Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks
文献类型期刊
作者Chen, Chen[1];Bai, Lin[2];Feng, Meiping[3];Huang, Minhua[4];Tian, Tian[5]
机构
通讯作者Bai, L (reprint author), Beihang Univ, Sch Elect & Informat Engn, Beijing 100191, Peoples R China.
来源信息年:2012  卷:2012  
期刊信息INTERNATIONAL JOURNAL OF DISTRIBUTED SENSOR NETWORKS影响因子和分区  ISSN:1550-1329
增刊正刊
摘要We consider signal transmission with the aid of multiple half-duplex single-antenna relay nodes using the amplify-and-forward (AF) strategy for a multiuser wireless machine-to-machine (M2M) communication system. In such a scenario, relay beamforming has been proved to be an effective way to improve system performance by employing spatial diversity gains. Early works have mostly focused on various centralized relay beamforming schemes based on global channel state information (CSI). Since global CSI is often unavailable due to geometric locations, power limitation, or other constraints of the relay nodes in M2M networks, our work aims to develop distributed algorithms that each relay node individually learns its own beamforming weights with local CSI. We propose two suboptimal relay beamforming schemes that only require local CSI to minimize mean square error (MSE) for all the users with nonorthogonal channels. For multiuser systems with orthogonal channels, we divide the optimization problem into multiple single user problems which then can be solved by each relay independently. Numerical simulations for the proposed algorithms are presented showing the performance of the proposed schemes is close to that of the optimal scheme with global CSI in terms of bit error rate (BER) criterion.
收录情况SCIE(WOS:000308171600001)  EI(20123815449018)  
所属部门电子信息工程学院
DOI10.1155/2012/213727
百度学术Distributed Beamforming for Relay Assisted Multiuser Machine-to-Machine Networks
语言外文
被引频次22
人气指数136
浏览次数136
基金National Basic Research Program of China (973 Program) [2009CB320403]
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