基于酉阵的MIMO系统空频编码方案  

Unitary matrix based space-frequency coding scheme for MIMO system

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作  者:张红[1] 郝东来[2] 

机构地区:[1]陕西职业技术学院计算机科学系,陕西西安710100 [2]西安通信学院信息传输系,陕西西安710106

出  处:《现代电子技术》2014年第12期46-48,共3页Modern Electronics Technique

基  金:国家自然科学基金项目(61301135);陕西省科学技术研究发展计划项目(2013JC2-17)

摘  要:针对多输入多输出系统发射分集方案中正交性与全速率之间的矛盾,在传统空频编码的基础上,提出了一种基于酉阵的空频块编码多天线系统发射分集方案。利用酉矩阵特性和块正交思想,给出了方案具体实施策略,并借助Givens变化生成典型固定酉阵,推导分析了所提方案全速率性能和准正交特性,证明了与空频块编码方案相比,该方案能更加充分地利用4根发射天线来增大空间分集的性能。最后通过不同场景下的仿真对比,也进一步验证了在不增加复杂度的情况下该分集方案的性能优势。Aiming at the contradiction between full rate and orthogonality in diversity scheme for multi-input multi-output system,based on traditional space-frequency block coding,a unitary matrix based transmit diversity scheme for space-frequency block coding multi-antenna system is proposed. The properties of unitary matrix and the idea of block orthogonal are adopted. The specific implementation strategy of the scheme is presented. A typical fixed unitary matrix is generated by means of Givens change. The full rate performance and quasi orthogonal properties of the scheme are deduced and analyzed. Compared with space-frequency block coding scheme,this scheme can utilize 4 transmitting antennas more fully to increase the space diversity perfor-mance. Simulation in different scenarios further proved the superiority in performance of the proposed diversity scheme.

关 键 词:多输入多输出 空频编码 酉矩阵 发射分集方案 

分 类 号:TN929.534[电子电信—通信与信息系统]

 

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