混合网络下的差异化异常跳变频率检测

Detection of Differentiation Abnormal Saltus Step Frequency Under Hybrid Network

混合网络下的差异化异常跳频,是一种新的高速短波通信体系,实际的混合网络中存在较高的预测阶数和虚检频率,采用传统跳变频率检测方法,无法精确检测出跳变频率,存在较大的频率失调量。提出一种基于MUSIC方法和Duffing混沌振子的混合网络下差异化异常跳变频率检测方法,分析了混合网络下的差异化异常跳变信号特征,采用MUSIC方法对差异化异常跳变频率进行初步估算,通过Duffing混沌振子对差异化异常跳变频率进行进一步检测,实现混合网络下的差异化异常跳变频率的高精度检测。仿真结果证明了该方法的有效性,具有较高的检测精度和较低的检测误差。

Hybrid network under abnormal differential frequency hopping, is a kind of new high-speedshortwave communication system, the actual hybrid network exists in the higher forecast order numberand higher virtual inspection frequency, using traditional jump frequency detection method cannotaccurately detect the jump frequency, there is a big amount of frequency disturbance. Put forward amethod based on the MUSIC and the mixture of Duffing chaotic oscillator network differentiation underabnormal jump frequency detection method, analyzes the differentiation abnormal jump signal andharmonic signal spectrum equivalence, MUSIC methods to preliminary estimates of differentiationabnormal jump frequency, through Duffing chaotic oscillator to further differentiate abnormal jumpfrequency detection, realize differentiation under hybrid network abnormal jump frequency of highprecision detection. The simulation results prove the effectiveness of the method, has high detectionaccuracy and low error.