Hardware Design And Implementation Of The Indoor Positioning System Based On Pseudo Satellite Technology

With the rapid development of economy and society and the emergence of various technologies,navigation and location technology has been developing rapidly.Meanwhile,the demand for navigation and location is also growing.At present,the satellite has basically met the people in an outdoor environment,but in the indoor environment,the satellite signal can not enter the room,navigation technology is still very limited,can not meet the growing demand for indoor positioning,in this social environment,for navigation related technology development is more and more attractive people's attention.In order to realize navigation and location in closed indoor environment,such as indoor parking lots,the indoor positioning hardware system based on pseudo-satellite technology is designed and implemented.The main goal of this paper is to propose the general scheme of the pseudorandom system,then design the hardware single board,complete the logical function design of the system and coordinate with the software side,and finally test the location function.Firstly,this paper analyzes the background and importance of the project,the task of this paper,after details of the location of the GPS satellite signal outdoor principle and the existing system,and put forward the signal system of pseudo satellite system,then the board of the system hardware types are discussed,pointed out that the use of ARM+FPGA to realize the hardware function,but also put forward the hardware design scheme of the project,including three parts,baseband and RF band,and on various parts of the detailed plan discussion.Secondly,in this paper,after determining the system demonstration project requirements,according to the needs and specific calculation logic resource usage,device selection of the main control device,the RF module and power supply module,FPGA select EP4CE55F23C8 N,ARM use STM32F767IGT6,then the various modules of the core circuit and peripheral circuit design.After the completion of the hardware design,the logic function of the system is implemented by FPGA.First,we analyze the logic function modules that need to be implemented,determine the functions and timing of each module,then simulate and analyze each module including the top level.Finally,after the completion of the basic functions of electrical veneer processing of single board are tested,including the power as well as the main control chip,and then in the FPGA on the logic function of the board,including board level test and board level verification,and collaborative software joint debugging.The final test results show that the whole pseudo satellite hardware system can work normally as expected.