摘要
为从侦收到的信息中得到帧同步码,提出了基于相关滤波及哈达玛变换的识别方法。该方法先利用二次相关滤波区分信息码和帧同步码,然后利用哈达玛变换压缩数据处理量识别出帧长,最后通过模糊匹配法进一步识别出同步码的同步起始位和码型。仿真结果表明:在较高误码率的影响下,该方法可以利用较少的数据量快速准确地建立帧同步,并具有较好的识别效果。
In order to recognize the frame synchronization codes of obtained information,a recognition method based on relativity filtering and Hadamard transformation algorithm was proposed in this paper.At first,using twice relativity filtering to distinguish the information codes from frame synchronization codes,then,the frame length was recognized by using Hadamard transformation in order to compress the amount of data.Finally,the fuzzy matching algorithm made further recognition to judge the initial point and style of synchronization code.Under the condition of high BER,the simulation results showed the method could set up the frame synchronization quickly and exactly by using less data,and had a better recognition effect.
出处
《探测与控制学报》
CSCD
北大核心
2011年第3期69-72,80,共5页
Journal of Detection & Control
关键词
相关滤波
哈达玛变换
帧同步码
识别
信息对抗侦察
relativity filtering
hadamard transformation
frame synchronization codes
recognition
information countermeasure reconnaissance
