The Research On Anti-irradiation TT&C And Data Transmission Terminal Based On Software Radio Platform

Modern warfare imposes higher requirements on the comprehensive processing of information,it requires that the satellite TT&C and data transmission terminals must occupy as little system resources as possible on the basis of strong environmental adaptability,and the reasonable integration of system resources on the spacecraft is particularly important,in order to meet this demand,it is necessary not only to carry out technical research on the space environment adaptability of TT&C terminals,but also to conduct detailed studies on miniaturized designs.At present,most TT&C terminals use independent radio frequency channels and baseband modules,which leads to complex device composition,large size,poor space environment adaptability,and weak radiation resistance.With the continuous improvement of microwave components,the development of high-speed A/D and D/A devices,the extensive use of DSPs,FPGAs and other processors in radio platforms have accumulated a lot of experience for the application of software radios in aerospace electronic devices.Therefore,platform products with high integration and strong environmental adaptability have emerged.Through miniaturization and anti-irradiation design,system resources can be effectively integratedand the complexity of equipment can be reduced,and the equipment is versatile,reduce its size and enhance environmental adaptability.This paper designs the key technologies for the miniaturization and strong space environment adaptability of TT&C terminals.(1)In response to the demand for miniaturization of aerospace TT&C terminals,the key technologies for the establishment of a anti-irradiation miniaturized platform were first introduced.Then,the hardware circuit design of the miniaturized platform was carried out,and a miniaturization software radio platform was built using AD9361 and ZYNQ platform as the core.The weight reduction of the anti-irradiation miniaturized platform is reduced to half that of the terminal in the past,and the miniaturization of the anti-irradiation terminal is improved.(2)In response to the demand for miniaturized terminals to enhance the space environment adaptability,the space environment and the possible radiation effects of the anti-irradiation miniaturized terminal were analyzed.The space failure factors of the components and the current mainstream anti-irradiation reinforcement methods were introduced,then propose a new anti-irradiation reinforcement strategy and implemented hardware anti-irradiation measures on major circuits to enhance the radiation resistance of miniaturized terminals.(3)In order to meet the requirements of radiation resistance for communication transmission in miniaturized terminals,the terminal's anti-irradiation software algorithm was designed.A fast acquisition algorithm was used to shorten the signal acquisition time,and a parallel tracking method was used to further speed up the signal tracking,reduce the time that the signal is affected by radiation.Innovatively design an anti-irradiation reinforcement algorithm,periodically refresh the terminal when it works normally,remove the impact of the radiation in time,and improve the reliability of the system,when the terminal is affected by radiation fails to work properly,the reinforcement algorithm globally configures it,completes the reconfiguration load in the shortest time,and restores it to normal.Through a variety of software algorithm strategies,the terminal can improve its anti-irradiation capability,thus ensure the normal operation of the spacecraft in orbit.(4)This paper aims at the development needs of the aerospace equipment's functional intensification and wide application,design an anti-radiation miniaturized software radio platform to realize the multi-functional integration of the terminal and significantly improve the space environment adaptability.Finally,a prototype was developed and tested,the anti-radiation miniaturized terminal can achieve rapid and accurate signal capture under conditions of large Doppler frequency shift in the space environment,meeting the requirements of normal satellite communications and achieving design goals.