一种有效的等帧长帧同步盲识别方法  

A Blind Recognition Method of Fixed Frame Length Frame Synchronization

作　　者：陆凯[1,2] 张旻[1,2] 李歆昊[1,2] 

机构地区：[1]电子工程学院,合肥230037 [2]安徽省电子制约技术重点实验室,合肥230037

出　　处：《火力与指挥控制》2015年第9期68-71,76,共5页Fire Control & Command Control

基　　金：国家自然科学基金(60972161);安徽省自然科学基金资助项目(1408085QF115)

摘　　要：提出一种基于分层的矩阵秩特征的判别方法,解决了等帧长帧同步的盲识别问题。首先构造等帧长帧识别的分层模型,然后在各子层中利用小区域矩阵秩值等于1的特征寻找可能的帧长值,统计各可能帧长值出现的概率判断真实帧长值,最后将序列按照所求帧长的方式构造矩阵,判定满足特定秩值搜索窗的位置和移动搜索窗的距离获取同步信息,达到帧同步盲识别目的。理论分析了搜索窗宽度对识别算法的影响,并推导了算法容错性,得出了算法具有很好的鲁棒性,能够满足非合作的盲识别的要求。仿真结果验证了算法的有效性,表明算法具有一定的工程应用价值。A novel approach of blind identifying of the frame synchronization based on the feature of hierarchical matrix rank discriminant is proposed in this paper.Firstly the frame size frame identification is constructed,such as a layered model,and then use the sub-layer in a small area to solve the matrix featrues a rank equal to the value of looking for possible frame size. Secondly statistical probability of each possible frame size appears to detemine the true value of frame length value. Finally,accordding to the frame length,construct the sequence into matrix,the distance is determined to satisfy the specific rank value of the search window position and movement of acquiring synchronization search window frame length,the purpose of identifying the frame synchronization information to the blind.Theoretical analysis of the impact of identification algorithm of the search window width and pushend to the algorithm of fault-to-tolerant,robust algorithm derived,it can meet the requirements of the non-coorporation of the blind identification.Simulation results show that the proposed method has some strong points as high robustness ,fast effectiveness and accurate recognition,and indicates that the method has a certain value in future engineering application.

关 键 词：帧同步 分层模型 矩阵秩 搜索窗 

分 类 号：TN911.22[电子电信—通信与信息系统]