Design Of DSP Processing Board For Airborne Radar On VPX Standard

Unmanned Airborne Synthetic Aperture Radar has the characteristics of all-weather,all-day,long-range and high-resolution imaging.It can support strip mode,bunch mode and ground moving target detection mode,which has been widely used in the military field and civilian areas.At present,the development trend of unmanned airborne synthetic aperture radar is that the volume is smaller and smaller,the weight is lighter and lighter,the anti-interference ability is stronger and stronger,and the resolution is higher and higher.Based on the advantages and development of the above-mentioned Unmanned Airborne Synthetic Aperture Radar(SAR),combined with the actual demand of real-time imaging processing system,this paper proposes and realizes the design of DSP processing board in real-time imaging processor of Unmanned Airborne Synthetic Aperture Radar.The board uses two TMS320C6678 + FPGA + VPX architecture,to achieve real-time imaging and ground moving target detection through the VPX interface to communicate with other boards,in addition the board has strong operation ability,large storage space and the external high-speed rich interface,strong compatibility,easy development and other functions.The core device of the Processing board is a high performance eight-core DSP-TMS320C6678,which clocked at up to 1.25 GHZ,with rich memory resources and high-speed interface.In the hardware design,the details of the board power module,clock module,peripheral interface module design,PCB layout and wiring design combined with signal integrity and power integrity,high-speed interface DDR3,Hyperlink and SRIO basic principles and the specific implementation method,and the stability and speed test of the high speed interface in this design are also carried out.The software of the processing board is that the processing board is used to realize the strip SAR 3m,1m,0.5m real-time imaging,bunching SAR real-time imaging,ground moving target detection and DBS imaging,which is a vital step in Unmanned Airborne Synthetic Aperture Radar(SAR).First of all,the basic idea of processing software design is introduced.Secondly,the function of sub-module in each mode is analyzed in detail.Finally,the result of real-time processing is given.The results of lots of experiments show that the DSP processing board in this paper meets the system requirements,and it can work stably in a complex environment.