短波110A信号检测分析方法研究

Study on HF 110A Signal Detection and Analysis Method

短波通信中110A信号应用广泛,研究110A信号的检测识别方法对短波无线电频谱监测具有重要意义。针对传统基于直接相关的检测识别算法在接收信号存在较大频偏时失效的问题,采用了相位差分相关的方法检测110 A信号,该算法通过相位差分抑制频偏,在接收信号中存在较大频偏时仍具有较好的检测性能。推导了传统相关检测算法与提出的相位差分算法检测统计量之间的关系,通过数值试验验证了算法的有效性。

In HF communication system,the 110A signals are widely used.For HF radio spectrum monitoring,it is important to study the detection and analysis method of 110A signals.The traditional detection and identification algorithm based on direct correlation may be ineffective when the receiving signal has larger frequency offset.In view of this problem,this paper adopts a phase difference correlation detection method to detect 110A signals.This algorithm uses phase difference to suppress the frequency offset,and has better detection performance when the receiving signal has larger frequency offset.The relationship between the test statistics of the traditional method and that of the method proposed in this paper is derived.Finally,the results of computer simulation prove the validity of this algorithm.