Multicarrier Communication for UHF RFID: Increased Reliability and Coverage for UHF RFID Systems

With the increasing popularity of industry 4.0 applications and the integration of network-capable small devices into the Internet of Things (IoT), the technical requirements for the transmission of information are also rising. High reliability is needed, especially for wireless systems used for industrial applications. One of the biggest challenges in this context is multipath propagation. Ultrahigh frequency radio-frequency identification, or UHF RFID for short, has proven to be a reliable technology for reading and transmitting data. In this communication system, the data records to be transmitted are modulated by a transmitter (reader) to an electromagnetic alternating field with a frequency between 860 MHz and 960 MHz and serve the receivers (transponders) not only for information transmission but also for energy supply.