Satellite Navigation Signal Storage Systems Research Missile

Modern Warfare mainly refers to the high-tech weapons in a conventional war mainlyunder the threat of nuclear weapons, the extensive use of high-tech weapons, high degree ofinformation warfare, war consumes huge war efficiency and other prominent feature ofmodern warfare. In order to meet the needs of modern warfare, to improve the precision strikeweapons, which the dynamic performance of the onboard navigation receiver has put forwardhigher requirements. However, in the actual testing process simulation of the dynamicreceiver will spend a lot of manpower and resources to design a device to simulate a realprojectile during flight navigation signals, while eliminating the need for repeatedexperiments, is of great significance and practical value. Aiming onboard the receiving systemto quickly locate performance requirements designed GPS satellite navigation signals anonboard storage device environment.First, the article combined with several modern war stories, for GPS applications in thewar were analyzed. Combining the advantages of GPS-guided weapons, the status ofdevelopment of domestic Trajectory Correction discussed, illustrates the lack of research onthe trajectory correction projectile direction. Further demonstrates the necessity of thistopic.Then, the article on the principles of GPS navigation signals for a detailed description toclarify the relationship between the GPS carrier, C/A code, data code between theestablishment of a mathematical model of GPS positioning principle. Based on this system tocapture and tracking algorithm were studied. Which capture aspects algorithm introducesseveral common GPS signal acquisition algorithm and several algorithms which carried out adetailed comparative analysis, the system captures the final draw parallel FFT algorithm codeacquisition algorithm conclusions. In the tracking algorithm, introduced the carrier ring andring code and phase, respectively, filters were studied and design. Then, the paper completed the study and implementation of the storage systemhardware.RX3605is designed based navigation chip RF front-end and baseband signalprocessing DSP+FPGA architecture based part. According to requirements of the systemoperation speed, power consumption, prices, analysis of a variety of chip selection basis todetermine the chip model, and ultimately around each chip design work completed theirperipheral circuits. Focus on the minimum system design DSP, FPGA configuration circuitdesign, system design, a communication interface, and no external expansion gives a DSPcircuit design method of the SDRAM in the design. Finally, more relevant EMC requirements,use PADS PCB design software to complete the storage system.Finally, the article on the system hardware debugging and actual test experiments.Hardware debugging and actual test results show that the storage system to work properly,and have good positioning performance...