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异步OFDM空时协同分集方案 被引量：1

Asynchronous OFDM Space-Time Cooperative Diversity Scheme
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摘要 提出一种基于空时分组编码的异步正交频分复用(OFDM,Orthogonal Frequency Division Multiplexing)协同分集方案。提出的方案在中继节点实现OFDM调制及OFDM符号的时间反转和复共轭,信宿节点接收信号的每个OFDM子载波都具有Alamouti空时分组编码结构。信宿节点采用最大似然(ML,Maximum Likelihood)译码准则译码。仿真结果表明,提出的异步OFDM空时协同分集方案无需两个中继节点的同步可获得二阶分集增益,且与其它协同分集方案相比,该方案的误比特率和实现复杂度都更低。 The asynchronous orthogonal frequency division multiplexing（OFDM） cooperative diversity scheme based on space-time block coding is proposed.OFDM modulation,time-reversion and complex conjugation of OFDM symbols are implemented at relay nodes,and each OFDM subcarrier of the received signals at destination node is of the Alamouti space-time coding structure,and the destination node adopts maximum likelihood（ML） decoding at destination.Simulation with Simulink indicates that this proposed scheme could achieve second-order diversity gain without the synchronization of between the two at relay nodes,has fairly low BER and is easy in implementation as compared with other cooperative schemes.
作者 鲍晶晶 赵兴华
机构地区 东莞职业技术学院 黑龙江移动大庆分公司
出处 《通信技术》 2011年第7期7-9,12,共4页 Communications Technology
关键词 异步协同分集 正交频分复用 ALAMOUTI 空时分组编码 放大转发 asynchronous cooperative diversity OFDM（Orthogonal Frequency Division Multiplexing） Alamouti space-time block coding amplify-and-forward
分类号 TN929.5 [电子电信—通信与信息系统]
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参考文献12

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二级参考文献20

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通信技术
2011年 第7期

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