摘要
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.
Impulse Radio Ultra-Wide Band（IR-UWB） is one of the promising techniques in the future aerospace application because of its distinguishing features of low power, high capacity, antimultipath and simple structure. Design of a spacecraft high speed data network based on IR-UWB is presented. Design of the IR-UWB transceiver, the wireless communication protocol and the hardware and software of the nodes are described in detail. The transmitter is based on the physical mechanism of fast recovery of the Step Recovery Diodes（SRD）, and the receiver is based on the tunnel diode circuit for impulse amplitude detection. Design of the communication protocol refers to the American military data bus standard MIL-STD-1553 B protocol, which is a time division command/response multiplex data bus. The design is tested and verified by the FPGA. The test results indicate the system design is reasonable.
作者
周莉
谢义方
安军社
熊蔚明
薛长斌
ZHOU Li XIE Yifang AN Junshe XIONG Weiming XUE Changbin(National Space Science Center, Chinese Academy of Sciences, Beijing 100190 Institute of Computing Technology, Chinese Academy of Sciences, Beijing 100190)
出处
《空间科学学报》
CSCD
北大核心
2017年第5期629-638,共10页
Chinese Journal of Space Science
基金
国家重大科技专项项目(TY3Q20110015)
中国科学院空间科学战略性先导科技专项项目(XDA04070000)共同资助
