摘要
在非协作方截获的数字序列帧同步码的识别问题研究中,由于帧的长度未知、帧同步码未知,给识别带来困难。为此,提出了利用小区域检测估计帧长,利用二次滤波估计帧起始位,然后用模糊匹配识别帧同步码型的识别方法,对巴克码或m序列进行了集中插入式帧同步识别仿真。仿真结果表明:在误码率不大于4%的情况下,上述方法对集中式插入帧同步的数据帧有较高的帧同步识别率:巴克码为80%,m序列为78%.
A method is proposed to recognize the frame synchronization codes of the sequence intercepted by non-cooperative part.This method is to use a small area detection algorithm to estimate the frame length,then use the secondary filter to judge the start bit of frame,and finally use the fuzzy matching algorithm to recognize the frame synchronization code.The simulation result shows that,if the bit error rate（BER） is less than 4%,the proposed method can achieve a high recognition probability for the frame synchronization code of synchronized data frames,where the recognition probabilities for the Barker codes and m-sequences are 80% and 78%,respectively.
出处
《兵工学报》
EI
CAS
CSCD
北大核心
2013年第5期554-560,共7页
Acta Armamentarii
关键词
信息处理技术
帧同步码
识别
小区域检测
模糊匹配
information processing
frame synchronization code
recognition
small area detection
fuzzy matching algorithm
