遥测数字接口的研究与实现

Research and Realization of Digital Interface for Telemetry

为了满足航天器遥测数字接口高码速率、高可靠性、小型化及低功耗等特性,设计了异步串行信号接收器。该接收器采用乒乓流水技术,将接收到的数据分别写入到两个RAM中,从而完成数据同时读写且互不干扰的操作。接收器的所有核心功能均集中在一片FPGA芯片内完成,实现了设备核心电路单片化设计,并较好地解决了数字电路通常出现的各器件之间信号互扰等问题。各种仿真及试验结果表明,该数字接口设备可以很好地满足航天器的各种要求。

To meet the requirements of high-speed, high reliability, and compact, low power consumption for digital interface used in telemetry of spacecrafts, the asynchronous serial signal receiver has been designed. In the receiver, the technology of ping-pang pipeline is adopted to write the received data into two RAMs, thus the read and write operations can be conducted at the same time without mutual interference. All of the core functions of the receiver are integrated in one FPGA chip to implement single chip design for kernel circuits of the equipment; and to solve the signal mutual interference problems which commonly appear among each component. The results of simulation and experiment indicate that the digital interface meets the requirements that spacecrafts need.