摘要
针对目前3GPP R8版本协议只支持单流波束赋形的现状,3GPP提出了支持双流的波束赋形以适应更高的传输速率需求。双流波束赋形在单流波束赋性的基础上增加了多流的传输和多用户传输技术,能有效提高系统传输速率,降低多用户之间干扰,使得系统在频谱效率上有很大提高。首先对基于特征值的波束赋形作了详细阐述,然后在简要描述了双流波束赋形标准化进展的基础上重点探讨了专用导频的设计,最后对确定的三个仿真场景进行了计算机仿真分析,从仿真结果看,双流波束赋形能满足系统不同场景下对信噪比的要求。
For 3GPP Release 8 only supports single layer beamforming,3GPP has proposed to support dual layer beamforming in LTE-Advanced systems to meet the demand for higher transmission rate.Compared with the single layer beamforming,the dual layer beamforming employs dual layer transmission and MU-MIMO techniques,which can improve the SNR of received signal,decrease interferences between many users,and increase the spectral efficiency of the systems.We first explain the eigen-beamforming in detail,and then discuss the design of DRS after giving an overview of standardization progress of the dual layer beamforming,and finally simulate three transmission cases.The simulation results demonstrate that the dual layer beamforming can meet the communication system＇s demand.
出处
《中国电子科学研究院学报》
2010年第6期633-637,共5页
Journal of China Academy of Electronics and Information Technology
基金
国家科技重大专项(2009ZX03007-002)
