DVB-S突发通信快速定时同步的FPGA实现

The FPGA Realization of Fast Synchronization in DVB-S Burst Communication

针对突发通信系统的特点,提出利用PN前导序列的良好相关特性,基于全并行流水FFT的快速同步方法。通过搜索FFT输出结果中超过自适应门限的多个峰值,找出最大峰值,实现突发数据帧头的快速捕获和最佳采样点的判决提取。该设计已经成功地在FPGA里得到实现,达到预期目标。

To deal with the burst communication,a technique of fast synchronization using PN preamble based on FFT is presented.The acquisition of the head of burst data frame,the estimation of the best sampling time and the emendation of the frequency deviation are implemented by searching the results of FFT that exceed the adaptive threshold and finding the biggest one.The design is successfully fulfilled in FPGA and achieves the prospective goal.