航管二次雷达射频切换单元FPGA实现

FPGA Implementation of MSSR RF Switching Unit

为适应中国民航对单脉冲二次雷达的双机热备份功能要求,采用现场可编程门阵列(FPGA),并使用硬件描述语言对可擦除可编程逻辑器件(EPLD)进行编程控制,以实现单脉冲二次雷达切换单元的主要功能:响应监控系统的切换命令,当设备故障时自动或者手动地切换到非故障机柜,使雷达连续地输出航迹数据。现场可编程门阵列的运用增强了射频切换单元控制的灵活性与可靠性,大大提高系统的检测性能与处理性能。

In order to meet the hot-backup function requirement on monopulse secondary surveillance radar from China civil aviation, adopting field programmable gates array （FPGA） and using hardware description language to control erasable programmable logic device （EPLD）, so as to realize the switching unit function of monopulse secondary surveillance radar： i{ the working channel is malfunction, responding the switching command of the control and monitoring system, and changing the working channel to the other spare channel automatically or manually, so that it can output track data continuously. With the high speed development of FPGA and EPLD, the flexibility and reliability of the switching unit are also greatly enhanced.