The Design Of Four Array Elements Satellite Navigation Anti-jamming Receive Digital Processing Platform

With the rapid development of modern electronic technology the theory of digital signal processing have been widely used, and have made remarkable achievements,especially in the areas of the speech signal recognition, sonar data acquisition, radar signal receiving, image information processing, satellite communications support. However, the electromagnetic environment has already became very complex, digital signal inevitably affected by the electromagnetic environment. No matter on the development of signal anti-jamming technology or on the research of anti-jamming processing platform, it becomes more and more important. Anti-jamming processing platform has very high requirements on the rate of navigation data processing and the amount of data processing.This subject is designed by FPGA core in order to ensure the system performance of anti-jamming and achieve the the purpose of low cost and save the hardware design space.Data transmission module is 14 bit high-speed high-precision analog-digital conversion channel. Using FPGA to collect data, in order to achieve the below functions. 1) Data down-conversion. 2) Data adaptive anti-interference. 3) Data up-conversion. Eventually,after the anti-interference algorithm processing navigation data restored to the analog signal for user terminals. This subject has already completed the circuit design of FPGA,navigation data collection channels, navigation data recovery channels, power supply systems, etc. Finally the paper completed the design of digital processing platform circuit schematics and printed circuit board and welding digital processing platform. Through analysis of system testing and navigation signal data of indoor and outdoor, verified the correctness and practicality of the design.As the core of four array elements satellite navigation anti-jamming receive digital processing platform, loading the adaptive anti-jamming algorithm, FPGA can satisfy the accuracy and stability of practical application. After the second time to develop and improve, according to the characteristic of miniaturization and low power consumption,this subject design has practical value.