可变帧结构的PCM遥测帧同步器设计

Design of Variable Frame PCM Telemetry Frame synchronizer

针对传统帧同步器只能对固定帧格式的数据进行帧同步的缺点,提出一种基于现场可编程门阵列(FPGA)的帧同步方案,用户可根据实际需求通过上位机软件配置帧长、帧同步字等参数,实现对不同帧结构的PCM遥测数据进行帧同步;该方案采用了参数可调的同步容错及前后方保护机制,提高了帧同步的可靠性和稳定性;给出了帧同步方案的工作原理,以及关键技术的实现方法,在实际应用中对其同步性能进行分析,测试结果表明该方案对不同帧结构的数据均可实现帧同步。

Data can only be fixed frame format frame synchronization which is shortcomings of the traditional frame synchronizer, is proposed based on field programmable gate array （FPGA） frame synchronization scheme, the user can configure the frame length by the PC software according to actual demand, the frame sync word and other parameters to achieve the PCM frame structure different telemetry data frame synchronization. The program uses a synchronous fault tolerance and front and rear protective mechanism adjustable parameters to im- prove the reliability and stability of the frame synchronization. Shows the working principle of the frame synchronization scheme, and the im- plementation of key technologies, in practical applications to analyze its synchronization performance, the test results show that the program data of different frame structure can achieve frame synchronization