Reducing Cyclic Prefix Overhead Based on Symbol Repetition in NB-IoT-Based Maritime Communication  

作　　者：Tian Xiang Daiming Qu Faquan Zhang Dejin Kong 

机构地区：[1]School of Electronic and Electrical Engineering,Wuhan Textile University,Wuhan 430200,China [2]Sthe State Key Laboratory of New Textile Materials and Advanced Processing Technologies,Wuhan Textile University,Wuhan 430200,China [3]School of Electronic Information and Communication,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《China Communications》2022年第9期1-9,共9页中国通信（英文版）

摘　　要：With the increasing maritime activities,a great demand of wide-area maritime digital data services is needed.Therefore,Narrowband Internet of Things(NB-IoT)that can provide wide coverage has been expected as an application for maritime communication networks(MCNS).In this paper,we aim to enhance the spectral efficiency in NB-IoT by reducing the cyclic prefix(CP)overhead in random access signal without causing interference.The key point of the proposed scheme is the symbols transmitted for multiple times repeatedly in NB-IoT.Specifically,all CP are removed and multi-path fading effect is eliminated by using a repeated symbol to cover the disturbed symbol to construct a circular convolution structure of the channel with the same effect as adding CP.In addition,a single-tap equalization is still appropriate.To validate the effectiveness of the proposed scheme,simulation results are carried out with respect to the bit error ratio(BER).

关 键 词：NB-IoT narrowband physical random access channel cyclic prefix spectral efficiency 

分 类 号：TP391.44[自动化与计算机技术—计算机应用技术] TN929.5[自动化与计算机技术—计算机科学与技术]