基于奇异值分解的TD-HSPA+系统赋形算法研究  

Study of SVD-Based Beamforming Algorithm in TD-HSPA+ Downlink Systems

作　　者：陈明佳[1] 张翔[1] 彭木根[1] 

机构地区：[1]北京邮电大学信息与通信工程学院,北京100876

出　　处：《中兴通讯技术》2011年第5期51-54,共4页ZTE Technology Journal

基　　金：国家科技重大专项(2010ZX03001-002);霍英东教育基金会(122005)

摘　　要：文章提出了一种适用于多径信道的基于奇异值分解(SVD)的波束赋形算法,并结合64正交幅度调制(QAM)高阶调制算法,对时分双工增强高速分组接入(TD-HS-PA+)系统性能进行仿真研究。文章重点分析了市区宏小区和市区微小区场景下SVD算法和特征向量法(EBB)的性能差异以及引入64QAM后的系统性能增益。系统级仿真结果表明,基于SVD的波束赋形算法相比传统EBB算法能够明显提升扇区平均吞吐量,引入64QAM后吞吐量能够得到进一步提升。This paper proposes a beamforming algorithm based on singular value decomposition （SVD）. The algorithm is suitable for the multipath channel in TD-HSPA＋ systems. A simulation evaluating the proposed algorithm with 64 quadrature amplitude modulation （QAM） was performed. Performance gaps between the SVD-based algorithm and traditional Eigen-value beamforming （EBB） algorithm were identified in macro urban and micro urban scenarios. The performance gain of 64QAM modulation was also evaluated. Compared with the traditional EBB algorithm, there is significant gain in average cell throughput when SVD-based algorithm is used. Furthermore, the 64 QAM can improve throughput.

关 键 词：奇异值分解 时分双工增强高速分组接入系统 64正交幅度调制 系统级仿真 

分 类 号：TN929.533[电子电信—通信与信息系统]