1. School of Information Science and Technology and Xi’an Key Laboratory of Advanced Computing and System Security, Northwest University, Xi’an, China
2. School of Electrical and Data Engineering (SEDE), University of Technology Sydney, Sydney, NSW, Australia
3. Shaanxi International Joint Research Centre for the Battery-Free Internet of Things, School of Information Science and Technology, and Xi’an Advanced Battery-Free Sensing and Computing Technology International Science and Technology Cooperation Base, Northwest University, Xi’an, China