Design BD-2Satellite Navigition Receiver And The Digital Baseband Signal Processing Software

Now, GPS Satellite Navigation System is mature and reliable, There is a widevariety of receivers which are based on GPS Satellite Navigation System, but thepositioning accuracy of receivers is disciplined by U.S., so our Army can not take it asthe main Navigation weapons；GLONASS Satellite Navigation System is disciplined bythe shortage of satellites, at our some areas in the day most of the time, it can not ensuremore than4satellites, so it can not be taken as Navigation System individually；Thepassive BD-1Satellite Navigation System has disadvantages, which are shortagecapacity and dynamic constraint, the poor positioning accuracy caused by height error.The BD-2Satellite Navigation System of all-weather, high precision, widecoverage of autonomous control, has positioning capabilities comparable to the GPS,Better than the GPS’s reliability and anti-jamming performance.The appearance of Software Radio technology is the third revolution in thecommunication domain after the developments from immobile communication tomobile communication and from analog communication to digital communication. Itmake full use of the modern micro-electronics technology、digital communicationtechnology and software technology.This thesis introduces the design of BD-2Satellite Navigation receiver based onRatio Software. The core navigation processing circuit designed and implemented byFPGA and DSP. This thesis sed RF circuit design software to design RF circuits.The second chapter introduces the basic structure of Ratio Software and Relatedprinciples of Digital IF；The third chapter introduces the whole schema of the receiver；The fourth chapter introduces the design of each unit and core components of theselection； The fifth chapter introduces the BCH decoding、 simulation andprogramming；The sixth chapter introduces debugging process receiver.This thesis designed the BD-2satellite navigation receiver，included the wholeScheme design, chip selection, schematic drawing, layout and wiring PCB, hardwaredebugging, and programming the BCH decoding software.Testing the receiver, it can realize the function of BD-2positioning, with20mpositioning accuracy.