基于FPGA的飞行校验多模信号采集与处理设计

针对仪表着陆系统(ILS)、甚高频全向信标(VOR)等的飞行校验需求,设计了一种基于FPGA的多模信号采集与处理系统。选用普通导航接收机接收信号,以FPGA作为逻辑和时序控制核心。系统包含了模拟信号调理和A/D转换、无线电系统总线(RSB)接口、ARINC 429总线接口、USB总线接口等的相应软硬件设计,首次在国内提出RSB软硬件实现方案。根据ILS与VOR的信号特点,并且分析了FPGA有限字长的影响,设计了数字滤波器,实现了在FPGA上的校验信号处理。经过验证,设计能够为飞行校验平台提供有效的数据,并且具备较强的可移植性,符合要求。

Multimode signal acquisition and processing design based on FPGA in flight inspection

Considering the requirements for the flight inspection of instrument landing system （ILS）,VHF Omnidirection range （VOR）,etc.,a multimode signal acquisition and processing system based on FPGA is designed.The normal navigation receiver is chosen to receive signal,and FPGA is chosen to control logic and sequential.System contains corresponding software and hardware of analog signal conditioning and A/D conversion,radio system bus （RSB） interface,ARINC 429 bus interface and design of USB bus interface,etc,softwareand hardware implementation scheme of RSB was firstly put forward in domestic.Based on the signal characteristics of ILS and VOR and analysis of the limited word length effect of FPGA,digital filter is designed,finally validation data processing based on FPGA is realized.After Validated,the design can provide effective data for flight calibration platform with strong portability and meets the requirements.