摘要
分析了一种基于校验多项式的节点同步方法。这种算法较之传统的卷积码节点同步方法,具有独立于译码器,对输入数据的平均幅值不敏感,可以快速获得同步状态,并且可以自动跟踪传输过程中的穿凿方式的变化等优点。基于该算法提出可选用的实现DVB-S接收系统中不同码率的卷积码的节点同步方案,并对该方案进行了软件仿真和硬件实现。在合理的硬件开销下,该方案表现出较好的同步性能。
By analyzing a syndrome based node synchronization algorithm, a solution for the node synchronization in DVB- S is proposed in this paper. Compared with the conventional method, the new solution is independent on decoder, can quickly realize the synchronization,and automatically follow the variance in transmission code rate. Performance result as well as implementation complexity estimates are presented. It is shown that under moderate hardware consume, the solution presents desirable synchronization performance.
出处
《现代电子技术》
2007年第1期74-77,共4页
Modern Electronics Technique
关键词
节点同步
DVB—S
穿凿卷积码
柱验多项式
node synchronization
DVB - S
punctured convolutional code
syndrome polynomial
