TCM/IDR信道单元帧同步的实现

Hardware Implementation of Frame Synchronization in TCM/IDR Channel Unit

基于格型编码调制 /中等数据速率 (TCM/ IDR)卫星通信信道单元帧结构的特点和预置启动法 ,研究具有分散插入且呈复杂周期性的帧定位信号搜捕方法 ,并利用现有的现场可编程门阵列 (FPGA)芯片和双端口随机静态存储器 (SRAM)实现了相应的帧同步器 。

Based on the characteristic of the frame structure of trellis coded modulation/intermediate date rate(TCM/IDR) channel unit for satellite communica tion and the requirement of preset and startup method, the search method is studied for frame alignment signals inserted discretely into each frame. By employing high speed dual port SRAMs and field programmable gate array(FPGAs), synchroniza tion detection, protection and other related timing circuits are implemented. The experimental results show that the schematic and hardware implementation are correct and the framing/deframing unit can be put into practical use.