TD-LTE系统中短期波束赋形的研究  

Research of Short-term Beamforming on TD-LTE System

作　　者：徐啸涛[1] 许静[2] 杨大方[3] 

机构地区：[1]浙江机电职业技术学院电气电子工程学院,浙江杭州310053 [2]国家知识产权局专利局专利审查协作中心通信发明审查部,北京100190 [3]上海贝尔阿尔卡特股份有限公司南京分公司移动业务部,江苏南京210037

出　　处：《电视技术》2014年第23期93-96,共4页Video Engineering

基　　金：浙江省科技厅2013年公益技术研究工业项目(2013C31133)

摘　　要：TD-LTE系统中使用的波束赋型是一个较为复杂的命题。特征值波束赋形形式上是基于奇异值分解的。它包括短期和长期两种形式,并且应用在不同特征的信道中。首先描述了短期波束赋形的算法,尤其是集中在如何把该算法应用在OFDM和TD-LTE系统中。然后阐述了短期波束赋形的软件结构设计实现,其中包括了一些基本概念的实现,SRS合路器和MAC层设计等。最后对其不同性能指标给出了详细的仿真,并且相应得出了一些技术结论。In this paper, a method of license plate character recognition is presented based on the combination of Zernike moment and wavelet trans- formation features. The beam - forming used in TD - LTE systems is a somewhat more complex proposition. Eigenvalue - based beam - forming （EBB） is based on singular value decomposition. It＇s included shortterm BF and Long- term BF two methods and applied in different channel knowledge. Firstly, it describes short - term BF algorithm, especially focused on the method how to apply for OFDM and TD - LTE system. And then make a SW designing implementation for short - term BF. It involves some basic idea of implementation, SRS combiner and MAC layer designing. Fi- nally, the paper gives the detailed simulation for different performance index and gets some technical conclusion. Short term beam - forming for deployment scenarios is with increases multipath （ high azimuth spread） and low UE mobility. An advanced beam - forming that is based on instantaneous channel state can be represented as hybrid short - term and long - term beam - forming. An adaptive selection of dominant eigenvectors of the long- term correlation matrix be considered.

关 键 词：TD—LTE 波束形成算法 性能仿真 SRS合路器 时间相关 

分 类 号：TP929.53[自动化与计算机技术]