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针对卫星内高速数据通信现有的点对点LVDS线缆通信带来的线缆束缚、布局困难、成本增加的难题,提出一种基于脉冲超宽带的星载高速无线数据网络设计方案,介绍了脉冲超宽带收发机、高速无线网络协议和无线网络节点软硬件设计的关键技术.发射机采用阶跃恢复二级管(SRD)产生皮秒级脉冲信号;超宽带脉冲接收采用幅度检测方法;无线高速网络协议设计参考美国军用数据总线标准MIL-STD-1553B协议,采用时分制指令响应机制,对1553B标准的许多指标进行扩展以适应UWB无线信道和高速传输特点,并通过FPGA成功实现.测试显示,地面演示系统应用层数据传输误码率小于10~(-9),表明了基于脉冲超宽带的星载高速数据网络设计的可行性和可靠性.
Aiming at the existing problems of cable-bound LVDS cable communication in satellite high-speed data communication, such as cable tether, layout difficulty and cost increase, this paper proposes a design scheme of high speed wireless data network based on pulse UWB, Broadband transceiver, high-speed wireless network protocol and wireless network node hardware and software design of the key technologies.The transmitter uses step recovery diode (SRD) to generate picosecond pulse signal; UWB pulse receiving amplitude detection method; wireless high-speed network The protocol design refers to the MIL-STD-1553B protocol of the U.S. military data bus, and adopts the time-division command response mechanism to extend many of the 1553B standard indicators to meet the UWB wireless channel and high-speed transmission features and achieve it successfully through the FPGA test shows that the ground The bit error rate of data transmission in the application system of demonstration system is less than 10 ~ (-9), which shows the feasibility and reliability of the design of space-based high-speed data network based on pulse UWB.