Main cpu of instrument adopt digital signal process unit ( arm core ) . the hardware design adopt distributing design which separate receiving and processing gps signal from the main system to use professional gps signal from the main system to use professional dsp to fulfill 组合导航仪的主处理器采用高精简指令集( arm内核)的数字信号处理器件,硬件部分采用分布式设计,将gps信号的接收及处理独立出来,采用专用dsp进行。