摘要
针对等帧长信号帧头难以检测的问题,提出一种基于累积滤波的算法,将截获序列按照帧长进行分组,整合对齐后进行累积,可以检测出帧头部分和数据部分。对帧结构特点进行了分析,介绍了累积滤波方法的原理,并对累积滤波方法的性能进行了测试。仿真试验表明,该方法在数据较短且具有一定误码的情况下仍能够准确地检测出信号帧头部分,具有一定的有效性。
Aim at the difficult detection of frame-head in communication countermeasure,a detection method is proposed based on accumulation filtering.First,the character of frame structure with fixed length is analyzed.Then,the principle of accumulation filtering method is introduced.Finally,the property of the method with MATLAB simulation is tested.Results show that the proposed method can detect frame-head quickly and exactly even in case of short data and error codes.
出处
《无线电工程》
2014年第6期33-35,59,共4页
Radio Engineering
关键词
帧头检测
等帧长
累积滤波
frame head detection
fixed frame length
accumulation filtering
