Design Of Digital Baseband And Technology Of Prototypic Verification On Enhanced Node Communication

Although RFID(Radio Frequency Identification) technology was invented earlier and its theory has matured,it has not been widely used due to its limited communication distance,high cost,and technical standardization.Since the 21st century,the cost of electronic tags has been continuously reduced,and the issue of technical standardization has become increasingly important.More and more sophisticated RFID technology has been applied to the Internet of Things(IOT)industry on a large scale.Electronic tags become a vital part of Io T applications by integrating sensors and memories.However,the communication distance of passive tags is still limited.At the same time,the traditional RFID reader-tag communication structure at both ends also restricts the application of RFID technology in the Internet of Things.In view of the above problems with RFID technology,this article designs a tag digital baseband specifically applied to two new RFID communication systems(transmitter-tag-receiver communication system,tag-tag communication system).Compared with the traditional reader-tag communication system at both ends,the number of communication nodes of these two new systems has increased.The transmitter-passive tag-receiver communication system with separate transmission and reception has a farther extreme communication distance.These two structures can make RFID technology more widely used in the Internet of Things.To this end,this article has done the following:(1)Custom protocols applied to two new RFID systems are customized,and the content of the protocol was explained:the protocol supports passive and semi-active tags,ASK Modulation and FSK modulation,FM0 encoding and MILLER-4 encoding;and in order to be suitable for different applications,the protocol supports tags with data in temperature sensor and data in memory.(2)The digital baseband(divided into passive and semi-active versions)supporting the custom protocol is designed.Each module is designed and functional verification is carried out.Gate level netlist is generated synthetically,parasitic parameters are extracted for static timing analysis and post simulation,and finally put into the tape.The area of the passive version of the chip is 82082.92?m~2,power consumption is 10.223?w;the area of the semi-active version is 86785.04?m~2,power consumption is 48.343?w.The power consumption and area parameters of baseband can support the baseband application in many practical scenarios.(3)The chip of the above custom protocol is applied to two new RFID systems.In the transmitter passive tag receiver communication system,when the transmitter passive tag's working distance is 0.9m,the communication distance of passive tag-SDR receiver is4.2m.In the semi-active tag semi-active tag communication system,when the distance between transmitter antenna and tag is 0.4m,the limit communication distance between two semi-active tags is 3.3cm.The experiment results show that the transmitter passive tag receiver communication system can break through the restriction of energy acquisition circuit and improve the limit communication distance of passive RFID system.It is proved that the semi-active tag semi-active tag communication system is feasible in the actual scene.(4)Based on the original function of 6C protocol tag,the digital baseband function is improved to make 6C tag work in two new communication systems.,a gate-level netlist is obtained,with a baseband area of 42439.80?m~2 and a power consumption of6.7536?w.The work in this chapter makes the 6C baseband compatible with two new RFID systems,which is conducive to promoting the commercialization of the tags of the two new systems.