基于DSP和FPGA的卫星数据压缩机的研制

根据卫星数传系统的要求,考虑FPGA的单粒子效应,提出一种多DSP+FPGA的卫星数据压缩机的硬件结构。介绍了CCD相机与数据压缩机之间的LVDS接口、数据压缩机与综合处理器之间的遥控遥测接口、硬件内部DSP与FPGA之间的串行EDMA方式通信接口的实现方法,以及DSP的仿真与引导过程。现阶段,该数据压缩机工程样机已完成方案阶段的联试实验,其硬件设计满足了大数据量的数据接口及实时压缩的要求,性能可靠。

Development of satellite data compression equipment based on DSP and FPGA

Based on the requirement of satellite data transfer system,this paper brings forward a scheme of data compression equipment using multi-DSPs + FPGA to avoid single event effects of FPGA.The paper describes the LVDS interfaces between the CCD camera and the data compression equipment,the remote control interfaces and the remote measure interfaces between the data compression equipment and the integrated processing element,and the McBSPs between DSPs and FPGA.The boot modes and emulation used by DSP are also presented.The first test experiments of the satellite have been finished.The prototype data compression equipment satisfied all requirements of large data streams,interface format and real time compressing and the capability of hardware is reliable.