基于ISA总线的无人驾驶直升机遥测数据地面处理系统

本系统对共轴式双旋翼无人驾驶直升机机载遥测数据采集系统发回的遥测数据进行码同步、帧同步、解密、信道解码等处理 ,并将恢复后的数据帧保存在缓存中。计算机监控程序通过 ISA(Industry Standard Architecture)总线 ,使用内存映像的方式访问数据并进行后续处理。本系统的码同步部分、用作缓存的双口 RAM以及 ISA总线接口部分使用 CPL D(ComplexProgrammable L ogic Device)实现 ,帧同步、解密和解码功能由单片机完成。系统结构简洁、功能可靠、体积小、重量轻 ,非常适合移动的车载遥测地面站。

Unmanned Helicopter Base Station Telemetry Data Processing System Based on ISA Bus and CPLD Technology

The functions of this system are code synchronizing,frame synchronizing,decrypting and decoding the PCM data stream,which is sent to the telemetry and telecommand base station by the airborne telemetry data acquisition system on the unmanned helicopter,and storing the reconstructed frame data in a DPRAM(Dual Port RAM).By using memory map mode,the computer monitor program can access the data and process the subsequent work through the ISA bus.The modules of code synchronization,DPRAM and ISA bus interface are implemented by using CPLD technology.And the modules of frame synchronization,decryption and decoding are achieved by using a single chip.With a concise construction,the whole system is small,light,and reliable.It is especially suitable for mobile telemetry and telecommand base station.