基于差分相位波形匹配的CPM信号帧同步检测方法  

Frame Synchronization Detection Method Based on Differential Phase Waveform Matching for CPM Signals

作　　者：赖鹏辉 王世练[1] 周锞 高凯[1] 杨春[2] Lai Penghui;Wang Shilian;Zhou Ke;Gao Kai;Yang Chun(School of Electronic Science,National University of Defense Technology,Changsha 410073,China;Institute of Electronic Engineering,China Academy of Engineering Physics,Mianyang 621900,China)

机构地区：[1]国防科技大学电子科学学院,长沙410073 [2]中国工程物理研究院电子工程研究所,绵阳621900

出　　处：《遥测遥控》2018年第6期46-51,共6页Journal of Telemetry,Tracking and Command

基　　金：国家自然科学基金(61501479)

摘　　要：为在解调之前高效地完成连续相位调制(CPM)信号的帧同步检测,并通过帧头信号辅助定时同步,提出一种基于差分相位波形匹配的CPM信号帧同步检测方法并在FPGA上实现。为消除累积相位对CPM信号波形的影响,对接收信号进行差分处理,再每隔一个采样周期与本地差分信号进行波形匹配。仿真结果表明,所提方法对相偏、频偏和相噪不敏感,可在信噪比较低的情况下以较高概率完成对CPM信号的帧同步检测。通过方法得到的帧头信号可将定时误差控制在一个采样周期以内,对定时同步的快速收敛具有较大的辅助作用。In order to complete the frame synchronization detection of Continuous Phase Modulation(CPM)signal before demodulation efficiently,and assist timing synchronization through the frame header signal,a frame synchronization detection method of CPM signal based on differential phase waveform matching is proposed.In order to eliminate the influence of the accumulated phase on the CPM signal waveform,the received signal is differentially processed,and the waveform is matched with the local differential signal every other sampling period.The simulation results show that the proposed method is insensitive to phase offset,frequency offset and phase noise,and can perform frame synchronization detection of CPM signals with high probability in the case of low signal-to-noise ratio.The frame header signal obtained by the method can control the timing error within one sampling period,and has a large auxiliary function for the fast convergence of the timing synchronization.

关 键 词：连续相位调制 帧同步 波形匹配 

分 类 号：TN919[电子电信—通信与信息系统]