一种新的2FSK信号识别方法

A Novel Recognition Method for 2FSK Modulated Signal

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。

The acquired signal,due to various reasons in signal processing,is always not complete.The incomplete signal,for its small information content and unidentified feature,would result in difficult processing and recognition.This paper proposes a novel method for recognition of incomplete 2FSK signal,which is based on the analysis of the properties of 2FSK signal.Firstly the incomplete 2FSK signal is distinguished,then the correlation property between one another obtained,finally the complete 2FSK signal recognized in accordance with the feature threshold.The computer simulation indicates that this method is of fairly high performance in low SNR （Signal Noise Ratio） condition.