CAJ | 학술논문

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。
제출료일충응용우도빈신호적조합식보도시빈분석방법，채용량충불동장도적창함수대신호진행시빈분석，분별득도구유교호빈솔화시간분변솔적량조분석결과；결합량조결과적우점，제고료원보도법적시빈분변솔，병통과이론분석화방진결과여이증명。재고사백조성조건하，대조합보도법재도속고계중적성능진행방진，결과표명해산법적신조비성능교보도법제고료3 dB좌우。
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.