LTE上行引入MIMO后的信道估计技术的研究
首发时间:2012-03-09
摘要:主要介绍LTE系统上行链路引入MIMO后的信道估计技术.目前看来,LTE中主要的MIMO技术主要是针对下行链路的,由于终端限制等等一些因素,直到LTE后期和LTE-A阶段才开始对上行MIMO进行重点研究.文中首先介绍了基础的上行和下行信道估计的方法以及他们的区别,然后着重指出了在进行上行MIMO的信道估计时遇到的问题,并阐述了该问题的具体解决方法和详细的公式推导,最后通过对含有MIMO技术的上行LTE链路层的仿真,对该在LTE上行MIMO系统中采用MLE算法进行信道估计的精确性进行了验证。
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Research on channel estimation algorithms in the system of LTE uplink with MIMO
Abstract:In this pape,an algorithm of channel estimation of uplink system in LTE with MIMO is introduced. Till now, most of the algorithms in for LTE with MIMO are studied for downlink systems. Due to restrictions of UE processing and storing ability, uplink system was not studied until the last phase of LTE and the beginning phase of LTE-A. Firstly, the difference between channel estimation in uplink and downlink systems is introduced. Then the problem in the research of channel estimation in uplink system and how to solve the problem is introduced. In the end, a simulation of the algorithm is used, and results show the validity of the algorithm we proposed.
Keywords: LTE channel estimation MIMO uplink
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