Time delay estimation algorithm of narrow band internet of things based on inter-cell interference cancellation

被引：0
|
作者：
Tang H. [1 ,2 ]
Mou H. [1 ,2 ]
Yang H. [1 ,2 ]
机构：
[1] School of Telecommunication and Information Engineering, Chongqing University of Posts and Telecommunications, Chongqing
[2] Chongqing Key Lab of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing
来源：
Tongxin Xuebao/Journal on Communications | 2019年 / 40卷 / 02期
关键词：
First arrival path searching; Inter-cell interference cancellation; NB-IoT; Time delay estimation;
D O I：
10.11959/j.issn.1000-436x.2019038
中图分类号：
学科分类号：
摘要：
Aiming at the characteristics of NB-IoT such as low power consumption, low cost and low sampling rate, an NB-IoT delay estimation algorithm based on inter-cell interference cancellation was proposed. To gradually eliminate the interaction between signals in each cell, an inter-cell iterative interference cancellation algorithm was considered. In each iteration, the idea of time-frequency cross-correlation overlapping was introduced on the basis of traditional correlation algorithms to break through the limitations of the sampling rate and further improve the accuracy of time delay estimation. At the same time, a first-arrival-path (FAP) searching algorithm based on noise threshold was used to suppress multipath effects. Through experimental simulation, the results show that the proposed algorithm can significantly improve the time delay estimation accuracy of NB-IoT on the basis of related algorithms. © 2019, Editorial Board of Journal on Communications. All right reserved.
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页码：92 / 101
页数：9
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