In-Band Full-Duplex FSK transceiver for IoT

Mohammed El Khattabi; Mohammed Khaldoun; Jelloul Elmesbahi; Ahmed Errami

doi:10.1515/freq-2020-0208

Article

In-Band Full-Duplex FSK transceiver for IoT

Mohammed El Khattabi , Mohammed Khaldoun , Jelloul Elmesbahi and Ahmed Errami

Published/Copyright: April 20, 2021

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From the journal Frequenz Volume 75 Issue 9-10

Abstract

A wireless frequency shift keying (FSK) transceiver that can simultaneously transmit and receive over the same radio channel using a novel complex baseband technique is introduced. The proposed design combines a traditional FSK modulator with a new frame-based demodulation technique able to recover data without using traditional cancellation techniques. Self Interference (SI) level has no impact on demodulation and can be ignored. The mathematical equations are detailed and validated by simulation. The implementation through software defined radio (SDR) using Ettus B210 USRP and GNU Radio proves that the system works properly and enables the In-Band Full-Duplex (IBFD) for FSK. An example of one single hope real-world IBFD communication is presented. Energy efficiency and System performances have been also evaluated using the bit error rate (BER) curve and discussed. The proposed technique enhances the spectral efficiency by factor 2 and seems very useful for low-rate applications such many internet of things (IoT) devices.

Keywords: FSK; GNU radio; In-Band Full-Duplex; IoT; SDR; software defined radio

Corresponding author: Mohammed El Khattabi, NEST Research Group, LRI Laboratory E.N.S.E.M, Hassan II University, Route d’El Jadida, km 7, BP: 8118, Oasis, Casablanca, Morocco, E-mail: elkhatt@gmail.com

Author contributions: All the authors have accepted responsibility for the entire content of this submitted manuscript and approved submission.
Research funding: None declared.
Conflict of interest statement: The authors declare no conflicts of interest regarding this article.

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Received: 2020-11-30

Accepted: 2021-04-07

Published Online: 2021-04-20

Published in Print: 2021-10-26

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https://doi.org/10.1515/freq-2020-0208

Keywords for this article

FSK; GNU radio; In-Band Full-Duplex; IoT; SDR; software defined radio