摘要
基于3GPP协议,提出一种窄带物联网(NB-IoT)下行基带正交频分复用(OFDM)解调算法的实现方法。从NB-IoT下行链路帧结构和基带OFDM信号产生原理入手,开展解调算法结构设计,减少解调的复杂度。整个解调算法采用MATLAB软件进行代码编写,利用是德科技(Keysight)的通用仪器搭建实验平台,获取NB-IoT下行基带信号并进行解调算法验证。实验结果表明,提出算法能够实现对NB-IoT下行基带信号的OFDM解调,其结果与是德科技89601B矢量信号分析(VSA)软件处理结果基本一致。
An orthogonal frequency division multiplexing(OFDM)demodulation algorithm for narrow band internet of thing(NB-IoT)down-link baseband signal was proposed,based on the 3GPP protocol.By analyzing the frame structure of NB-IoT down-link signal and the generation principle of OFDM baseband signal,a novel algorithm structure was constructed to diminish the demodulation complexity.The coding design of the algorithm was accomplished on the MATLAB software platform,and an experimental platform based on Keysight’s general instrument was implemented to generate the relevant NB-IoT downlink baseband signal and verify the proposed algorithm.As the experimental results show,the presented algorithm is competent to demodulate the NB-IoT downlink baseband signal,and its results are consistent with the counterparts obtained through Keysight’s 89601B vector signal analyzer(VSA).
作者
王超
阴亚东
曹乐平
WANG Chao;YIN Ya-dong;CAO Le-ping(School of Physics and Information Engineering,Fuzhou University,Fuzhou 350116,China;Fujian Integrated Circuit Design Center,Fuzhou 350108,China)
出处
《计算机工程与设计》
北大核心
2020年第9期2423-2427,共5页
Computer Engineering and Design
基金
福建省自然科学基金项目(2017J01760、2017J01734)。
关键词
窄带物联网
正交频分复用
下行链路
解调算法
矢量分析仪
narrow band internet of thing(NB-IoT)
orthogonal frequency division(OFDM)
downlink
demodulation algorithm
vector signal analyzer(VSA)
