Design Of Wake-up Receiver Transmission Based On Sampling Technology For Low Power Internet Of Things

With the rapid development of Internet of Things technology,wireless sensor network technology is more and more concerned by academia and industry.By using a large number of sensors which can communicate with other sensors and sense the environment to form a network,it can be used for fire prevention and control,and realize intelligent storage and other functions.However,the service life and cost of the nodes face a huge test because of the large number of sensors using as nodes.In order to increase the service life of nodes in wireless sensor networks,researchers have proposed the concept of wake-up receiver.Wakeup receiver is a very low-power receiver with power consumption in the range of ?W.It is mainly used to receive wake-up signals to wake up the main receiver.Usually the main receiver is turned off and the wake-up receiver is in working state.When the wake-up receiver receives a communication request,it wakes up the main receiver,then the main receiver starts to work.After the communication is completed,the main receiver is turned off.The purpose of this thesis is to design a Wu R with low power consumption,high sensitivity,and the ability of transmission.Compared with traditional wake-up receivers,the proposed receiver has the advantages of low power consumption,long communication distance,and can be better applied to networking technologies.The main work of this article is as follows:First of all,this thesis investigates and compares the research status at home and abroad,analyzes the architecture of several wake-up receivers and traditional receivers,and summarizes the research direction and development trend of the current technology.Secondly,the basic theory of wake-up receiver technology is researched,and the existing wake-up receivers are introduced.Then we decided to design our Wu R on the basis of active wake-up receivers.The focus of this thesis is to sample the existing log-power detectors at the bit-level duty cycle to greatly reduce their power consumption,and to process identification signals by using low-power filter amplifiers and low-power MCUs.Finally,the prototype of the proposed wake-up receiver was realized and tested.The experiment verifies that its power consumption is 310?W,and the sensitivity bit is-72 d Bm,which has reached the level of mainstream wake-up receivers.At the same time,the designed wake-up receiver can easily change the data rate and power consumption by setting the MCU to be suitable for different environments.Aiming at the characteristics of the wake-up receiver,a coding method suitable for the wake-up receiver is designed,and symbols are identified by level jumps to avoid additional energy consumption caused by bit synchronization.Finally,a customized frame of data is sent via software defined radio,identified by waking the receiver prototype,and output on the serial port.The test results show that the design,production and debugging of the wake-up receiver for low-power Io T has been well completed in this thesis,and the data can be identified.Finally,this thesis summarizes the work content and points out that the work content needs to be improved in the future.