卫星内无线射频总线设计

Wireless RF bus design for an intra-satellite

为降低卫星的研制与开发成本,缩短总装总测周期,实现部件或单机的即插即用与快速测试,提出了卫星内无线射频通信设计方案.采用商用现货器件(COTS)实现了星内无线数据总线基本通信节点的设计,通过自主断电再加电控制策略,提高了COTS器件空间应用的可靠性.设计了三层模型结构的无线网络协议,采用(8,4)汉明码纠检错算法,提高了数据传输的可靠性.搭建了基于基本通信节点的星内无线网络试验平台,进行仿真验证,实验结果表明,基本通信节点可以随时接入和退出网络、异常情况下能实现自断电再加电重新运行,系统误码率满足卫星控制要求,星内无线射频通信方案可行.

In order to reduce the development cost and shorten assembly time of a satellite, this paper proposed a method of wireless radio frequency （RF） bus design for an intra-satellite which can realize plug and play, as well as rapid testing. The communication node of the wireless data bus was designed with commercial off-the-shelf （COTS）. To improve the reliability of COTS in space application, a control strategy of de-energizing and then imposing electricity by itself was proposed. Moreover, a network protocol with three-layer model structure was designed, and the reliability in data transmission was improved by employing the （8,4） Hamming code error correcting method. Finally, the simulation was carried out by setting up the intra-satellite wireless network test platform of basic communication nodes. The results show that communication nodes can connect and disconnect the network at any time, and the platform can rerun by de-energizing and imposing electricity by itself under abnormal conditions. Additionally, the systematic error rate can satisfy control requirements. Therefore, the wireless network platform can perform successfully .