LTE-A中UE专用参考信号的解调算法与实现  

Demodulation Algorithm and Implementation of UE-specific Reference Signals for LTE-A

作　　者：黄菲[1] 丁月友 HUANG Fei DING Yue-you(Chongqing Key Lab of Mobile Communications Protocol, Chongqing University of Posts and Telecommunications, Chongqing 400065, Chin)

机构地区：[1]重庆邮电大学移动通信重庆市重点实验室,重庆400065

出　　处：《无线电通信技术》2017年第1期94-98,共5页Radio Communications Technology

基　　金：重庆市教委科学技术研究项目(KJ1500428)

摘　　要：针对LTE-A新增的UE专用参考信号与小区参考信号映射的时频资源不同,导致传统的解调算法在UE专用参考信号上无法适用的问题。充分研究了UE专用参考信号时频资源映射的特点,即端口间采用了频分复用和码分复用技术区分,而小区参考信号只采用了频分复用技术,结合此特点与传统的解调算法原理,设计了2种利用专用导频信息的解调算法,即LS-UE算法和LMMSE-UE算法。最后,通过在EPA无线信道环境下,对2种解调算法的性能仿真,权衡实现的复杂度,选择一种更适合LTE-A系统的下行解调算法,即LS-UE算法,并对该算法的多核DSP实现,验证了该算法的可行性与高效性。Considering the different time-frequency resources between UE-specific reference signals and CRS in LTE-A, the traditional demodulation algorithms cannot be applied to UE-specifie reference signals.The feature of time-frequency resource mapping of UE-specific reference signals is that frequency division multiplexing and code division multiplexing are used in the ports,while the CRS only uses frequency division multiplexing. Combined with the traditional principle of demodulation algorithms,the paper provides the design of two demodulation algorithms, LS- UE and LMMSE - UE. Finally, considering the performance simulation under three wireless channel environments and the complexity of implementation,LS-UE is considered as more suitable for LTE-A system,and the multi-pore DSP implementation of LS-UE verifies the feasibility and effectiveness of the algorithm.

关 键 词：LTE—A UE专用参考信号 解调算法 多核DSP实现 

分 类 号：TN929[电子电信—通信与信息系统]