CAJ | 학술논문

针对通信对抗中跳频信号的检测问题，提出一种基于自适应形态学边缘检测的时频检测算法。该算法把跳频信号的时频谱图SP（Spectrogram）视作一幅图像，首先利用多尺度结构元素对其滤波，再根据图像边缘方向自动选择相应方向的结构元素进行边缘检测，最后通过与设定的阈值比较判决跳频信号是否存在。仿真结果表明，此算法可以有效去除噪声和干扰信号，增强跳频检测系统鲁棒性、提高检测效率。
침대통신대항중도빈신호적검측문제，제출일충기우자괄응형태학변연검측적시빈검측산법。해산법파도빈신호적시빈보도SP（Spectrogram）시작일폭도상，수선이용다척도결구원소대기려파，재근거도상변연방향자동선택상응방향적결구원소진행변연검측，최후통과여설정적역치비교판결도빈신호시부존재。방진결과표명，차산법가이유효거제조성화간우신호，증강도빈검측계통로봉성、제고검측효솔。
Aiming at frequency-hopping (FH)signals detection in communication confrontation,a time-frequency detection algorithmbased on adaptive morphological edge detection is proposed.In the algorithm,the time-frequency spectrogram of FH signals is regarded as theimage,and the multi-scale structure element is used to filter its noise first.Then,the structure element in corresponding direction isautomatically selected according to the direction of the image edge to detect the edges.Finally,by comparing with the threshold value set,whether there are the FH signals or not is determined.Simulation result demonstrates that the algorithm can effectively remove the noise andinterference signals,enhance the robustness of FH detection system,and improve the detection efficiency.