A Survey about application based on RF signals

With the popularity of commercial wireless devices, the research based on RF signal has developed rapidly in the past decade. RF signals have great advantages in environmental perception. Wireless signals are transmitted through the transmitter. With the propagation of these signals in the medium, they are reflected from different objects and people in space to the receiver. In this process, rich environmental perception information is carried. These ubiquitous perceptual information has rich application significance and bright prospects in the fields of indoor positioning, motion perception, behavior recognition, human-computer interaction, fall detection, health monitoring, smart home, search and rescue and so on. This paper will discuss and analyze the current research results by combing some existing literature and the research status of relevant researchers in relevant fields at this stage, so as to understand the future development trend of RF signal based applications.