量子通信基于量子力学的基本原理,具有绝对安全的特点。本文介绍了一种应用于量子卫星上的数据传输系统,该系统以PPC为处理器,Vx Works为操作系统,通过PCIE与硬件互连。详细介绍了该系统在Vx Bus架构下对PCIE的驱动开发,通过XAPP1052例程下的DMA设计对驱动程序进行了配置寄存器空间测试,并且通过量子通信算法实验验证,DMA写速度达到221MB/s,DMA读速度达到176MB/s,实验证明系统稳定可靠,开发的驱动程序能使系统达到数据高速传输的目的。 Quantum communication based on the basic principles of quantum mechanics, with absolute safety features. This article describes a data transmission system used in quantum satellites that uses PPC as the processor and VxWorks as the operating system, interconnected by hardware with PCIE. This paper introduces the system development of PCIE under Vx Bus architecture in detail, and configures driver space by DMA design under XAPP1052 routines. Through the experimental verification of quantum communication algorithm, the DMA write speed reaches 221MB / s, DMA read speed of 176MB / s, experiments show that the system is stable and reliable, the development of the driver can make the system to achieve the purpose of high-speed data transmission.