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在信号处理中常常因为各种原因导致获取的信号并不完整。残缺信号由于其信息量小、特征不明显等特点造成处理难度大或者无法识别等困难,是信号处理领域内研究较少的内容。文章在研究分析频移键控信号(FSK)特性的基础上提出一种用于残缺二进制频移键控信号(2FSK)识别的新方法。首先将残缺的2FSK信号识别出,然后两两提取相关特征,最后根据特征门限识别出完整的2FSK信号。计算机仿真实验证明了该算法在低信噪比下具有较好的性能。
In signal processing often due to various reasons, the signal obtained is not complete. Due to the small amount of information and the insignificant characteristics of the incomplete signal, the incomplete signal is difficult or unidentifiable to deal with. The incomplete signal is less studied in the field of signal processing. Based on the study of the characteristics of Frequency Shift Keying Signal (FSK), this paper proposes a new method for the identification of incomplete binary Frequency Shift Keying Signal (2FSK). First, the incomplete 2FSK signal is identified, and then the related features are extracted two by two. Finally, the complete 2FSK signal is identified according to the feature threshold. Computer simulation experiments show that the algorithm has good performance at low SNR.