42of communication from human and human to human and things or things and things. Based on RF identification (RFID), sensor technology and other smart technologies, many objects surrounding us will be connected into networks and a variety of applications are present [1].The term IoT was initially proposed as the extended concept of objects with RFID technology. Later on, more and more technologies such as sensors, actuators, GPS devices and mobile devices are embedded into IoT technology [2]. China Communications Standards Association (CCSA) gives one definition of IoT: A network, which can collect information from the physical world or control the physical world objects through various deployed devices with capability of perception, computation, execution and communication, and support communications between human and things or between things by transmitting, classifying and processing information [3]. According to this definition, the IoT system could be divided into many subsystems. The information from things will be directly collected by sensor network and processed by computing system where wireless or wireline communication is used to transfer and share all the information between every node. For example, when IoT is used for intelligent transportation systems, the transportation agencies will be Abstract: This paper reviews recent advances in radar sensor design for low-power healthcare, indoor real-time positioning and other applications of IoT. Various radar front-end architectures and digital processing methods are proposed to improve the detection performance including detection accuracy, detection range and power consumption. While many of the reported designs were prototypes for concept verification, several integrated radar systems have been demonstrated with reliable measured results with demo systems. A performance comparison of latest radar chip designs has been provided to show their features of different architectures. With great development of IoT, short-range low-power radar sensors for healthcare and indoor positioning applications will attract more and more research interests in the near future.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.