Research Of Mitigating Single-event Upset And Data Communication For Laser Warning System

In recent years, laser technology is widely used in the military and aerospace fields.Especially the anti-satellite laser weapons pose a serious threat to spacecraft and satellites.Therefore many countries pay more and more attention to the research of on-satellite laserwarning equipment. How to overcome the SEU phenomenon is the core content of on-satellitelaser warning system. This paper focused on the solutions to the SEU phenomenon. And tostudied several inter-module communication and non-uniformity correction.Laser warning system consists of four main parts. Optical subsystem, signal receivingsubsystem, signal processing subsystem and display subsystem. The core of the system isthe signal processing subsystem. FPGA and DSP are easily influenced by the high-energyparticle radiation in this part. In this paper, two aspects of hardware and software for aspecific design On the hardware side, the watchdog circuit of DSP is appended to thesystem. FPGA uses the CRC calibration circuit. On the software side, the redundancydesign of the flag bits in DSP programs is necessary, and make a backup of DSP programsin flash. FPGA TMR method focuses on the camera control signals and communicationcontrol signals. Because the laser warning system demands high real time capability, andhas to process a large amount of data. So FPGA is responsible to drive andcontrol the detector. And DSP is responsible for data processing. FPGA is connectedwith DSP via EMIF interface. Data transmission between FPGA and DSP uses the methodof EDMA. Non-uniformity correction in the DSP is performed after the data received. Themethod of non-uniformity correction is Two-points Non-uniformity Correction Algorithm.Eventually DSP will send out the results of data processing by controlling the CAN buscontroller.Finally，using different wavelength of lasers incidents from different angles. Displaythe wavelength, azimuth angle and pitching angle in the LCD display. Prove that the program can be booted correctly and the data can be transmitted normally. Because of the limitation ofcondition, we cannot carry out the energetic particle radiation experiment, and only completedthe boot-loader experiment. Experiments showed that the system can load the correctprogram.