QAM Modulation Based on Lowest Energy Consumption in Passive CRFID.

Energy consumption and lacking of spectrum resources have become the bottleneck in the development of the Internet of Things. Reducing energy consumption in RFID tags is an important issue that needs to be studied in the communication links. The modulation module in the tag consumes as little energy as possible and applies most of the collected energy to the tag the IC. In order to increase the communication efficiency in the passive system, it is necessary to optimize the modulation mode of the traditional passive RFID. The traditional modulation method cannot collect the energy effectively and transmit the data accurately. In this pursuit, the present study was envisaged to improve the situation by using QAM modulation instead of traditional modulation, and provide a new possibility for the application of CRFID. Furthermore, the transmission quality of signals under different channels was compared. In the experiment simulation stage, the QAM modulation simulation module was established, and the energy of the tag IC was maximized when the modulation impedance was greater than half of the impedance of the tag antenna. [ABSTRACT FROM AUTHOR]