Phase detection and modulation improvement for active load modulation during continuous transmission

Suhadolnik, Nejc (author), Rozman, Jernej (author), Svete, Tilen (author), Korošak, Žiga (author), Atanasijević-Kunc, Maja (author), Pleteršek, Anton (author)

The paper covers one of the communication technologies used in wireless sensor networks. We have presented improvements in existing radio frequency identification (RFID) systems to address the problem of the phase selection in active load modulation (ALM). The phase selection affects the interoperability of communication devices and has to be addressed in the design phase of a new tag. A novel transmission method is presented to make the phase selection irrelevant for device interoperability. A second solution is shown to improve the existing system synchronization, which allows operation with arbitrary selected phase. A mathematical analysis of signals present on the antenna was used together with the reference reader model to perform an analysis of proposed improvements. We proved that the proposed transmission method is less affected by phase selection. Furthermore, we demonstrated that existing system improvement allows synchronization and operation at an arbitrarily selected phase despite the continuous transmission and large signal-to-interference ratio.

• Language: English
• Keywords: wireless sensor networks, radio frequency identification, near field communication, active load modulation, binary phase shift keying, interference measurement
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FE - Faculty of Electrical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2021
• Number of pages: 16 str.
• Numbering: Vol. 21, iss. 18, art. 6155
• PID: 20.500.12556/RUL-136193
• UDC: 681.5
• ISSN on article: 1424-8220
• DOI: 10.3390/s21186155
• COBISS.SI-ID: 79864067
• Publication date in RUL: 19.04.2022

Record is a part of a journal

• Title: Sensors
• Shortened title: Sensors
• Publisher: MDPI
• ISSN: 1424-8220
• COBISS.SI-ID: 10176278

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 14.09.2021

Secondary language

• Language: Slovenian
• Keywords: brezkontaktne senzorske mreže, radiofrekvenčna identifikacija, RFID, komunikacija v bližnjem polju, NFC aktivna bremenska modulacija, BPSK modulacija, interferenčna meritev