一种改进的最小频移键控调制信号定时同步方法  

Modified Method of Blind Timing Synchronization for MSK Signal

作　　者：吴雪峰 WU Xue-feng(Information System Bureau,Department of Naval Equipment,Beijing 100841,China)

机构地区：[1]海装信息系统局,北京100841

出　　处：《通信技术》2020年第5期1111-1115,共5页Communications Technology

摘　　要：MSK信号具有良好的频谱效率和功率效率,在通信系统中应用十分广泛。同步作为解调的前提,对MSK信号同步方法的研究十分必要,从而达到解调分析信号的目的。在复杂电磁环境中,信号可能受到噪声和信道衰落等影响,增加了MSK信号的正确盲同步处理难度。因此,提出了一种基于新型非线性变换与前馈结构的MSK信号同步方法,可对信号实现符号定时同步。该方法适用于较低信噪比的情况,算法精度高且计算复杂度较低,还可在缺少先验信息的条件下对MSK信号实现同步,能在一定程度上有效克服信道衰落等因素的影响,获得较好的处理性能。MSK signal,for its good spectral efficiency and power efficiency,is widely used in communication systems.As the premise of demodulation,it is necessary to study the method of MSK signal synchronization,so as to achieve the purpose of demodulation and analysis of signals.In a complex electromagnetic environment,the signal may be affected by noise and channel fading,increasing the difficulty of correct blind synchronization processing of MSK signals.Therefore,a MSK signal synchronization method based on a new type nonlinear transformation and feedforward structure is proposed,which can achieve symbol timing synchronization of signals.This method is suitable for the case of low signal-to-noise ratio,high algorithm accuracy and low computational complexity,can also achieve synchronization of MSK signal under the condition of lack of prior information,effectively overcome the influence of channel fading and other factors to a certain extent,and obtain better processing performance.

关 键 词：最小频移键控信号 定时同步 非线性变换 符号定时 

分 类 号：TN918.91[电子电信—通信与信息系统]