组合谱图法在跳频信号时频分析中的应用  

Applications of combined spectrogram to frequency-hopping signal analysis

作　　者：曾祥峰[1] 杨育红[1] 崔鹏辉[1] 温洲[2] 

机构地区：[1]信息工程大学信息工程学院 [2]中国人民解放军65021部队

出　　处：《计算机工程与应用》2013年第13期89-92,共4页Computer Engineering and Applications

摘　　要：提出了一种应用于跳频信号的组合式谱图时频分析方法,采用两种不同长度的窗函数对信号进行时频分析,分别得到具有较好频率和时间分辨率的两组分析结果;结合两组结果的优点,提高了原谱图法的时频分辨率,并通过理论分析和仿真结果予以证明。在高斯白噪声条件下,对组合谱图法在跳速估计中的性能进行仿真,结果表明该算法的信噪比性能较谱图法提高了3 dB左右。A new combined spectrogram method is proposed for Frequency-Hopping （FH） signal analysis, which adopts two windows with different length to analyze the signals and gets two kind of results separately with better time-resolution and better frequency-resolution. By combined the advantage of two kinds of results, the time-frequency resolution is improved, and the im-provement is proved by theoretical analysis and simulation results. At last, the performance in hop rate estimating with Gauss white noise has been given by simulation, the results show that the SNR（Signal Noise Ratio） performance enhances about 3 dB.

关 键 词：跳频信号 时频分析 组合谱图法 参数估计 

分 类 号：TN911[电子电信—通信与信息系统]