【作者】 陈晓芳； 柳娜娜； 徐文波；

【Author】 CHEN Xiaofang;LIU Nana;XU Wenbo;College of Information and Telecommunication Engineering,Beijing University of Posts and Telecommunications;

【机构】 北京邮电大学信息与通信工程学院；

【摘要】 研究当前通信对抗领域中的帧同步盲识别方法。在已有基于分层矩阵秩特征判断的方法中,存在判断结果不够直观、算法复杂度过高、计算时间随子层数量增长急剧增加的问题。为了解决上述问题,提出一种简化算法。该算法通过计算分层矩阵的序列和,得到每个矩阵对应的统计概率,最终通过这些统计概率判断帧长估计值,并利用序列和识别出帧起始位置和帧同步码。在无误码和有误码的场景下,对所提出算法和已有算法进行仿真对比,结果表明所提算法不但能降低复杂度,还能够提高帧同步盲识别的准确度。更多还原

【Abstract】 In this paper,the blind recognition method of frame synchronization in the field of communication countermeasure is studied.In the existing methods based on the rank characteristics of hierarchical matrix,there are still some problems,such as the judgment result is not intuitive enough,the algorithm complexity is too high,and the calculation time increases sharply with the number of sub-layers.This paper proposes a simplified algorithm to solve the above problems.The algorithm calculates the sequence sum of the hierarchical matrix to obtain the statistical probability corresponding to each matrix.Finally,the statistical probability is used to determine the frame length estimate,and the sum of sequence is used to identify the frame start position and frame synchronization code.In the two scenarios of whether there are bit errors or not,the simulation comparison between the proposed algorithm and the existing algorithm is carried out.The results show that the algorithm in this paper can not only reduce the complexity,but also improve the accuracy of frame synchronization blind recognition.更多还原