Compensation of the Frequency Offset in Communication Systems with LoRa Modulation

Symmetry

Semen Mukhamadiev¹  Evgeniy Rogozhnikov¹  Edgar Dmitriyev¹ 

[1] Department of Telecommunications and Basic Principles of Radio Engineering, Tomsk State University of Control Systems and Radioelectronics, 634050 Tomsk, Russia;

关键词: wireless communication system;    LoRa;    IoT;    frequency offset;   

DOI  :  10.3390/sym14040747

来源: DOAJ

【 摘 要 】

This study focused on methods estimation and compensation frequency offset in communication systems with LoRa modulation. LoRa being used in IoT applications rapidly expands its markets. The article discusses three methods for estimation and compensation frequency offset as well as details of the comparative analysis made. Aside from the well-known methods by Ghanaatian and Golden Section Search (GSS), the third method is offered by the authors of the article and represents an improved version of the method proposed by Ghanaatian. The proposed method is based on a symmetric processing signal that is divided into two parts. The advantages and drawbacks of the considered methods are described. As a result of the performed study, a software model was developed, the dependence of the root mean-square error (RMSE) estimation of the frequency offset, and cumulative density function (CDF) of the frequency estimation error was calculated. Modeling was performed under identical conditions. The frequency offset accuracy provided by the proposed method exceeded the accuracy of the considered methods.

【 授权许可】

Unknown