【作者】 王丹志； 宋俊德； 宋梅；

【Author】 WANG Dan-zhi, SONG Jun-de, SONG Mei(School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China)

【机构】 北京邮电大学电子工程学院；

【摘要】 为了实现对跳频图案快速准确地捕获,通过对Cohen类时频分布、核函数以及时频分布重排进行研究,提出了基于科恩-重排时频分析的跳频图案时频相关的捕获方法.时频相关的捕获方法能准确、有效地描绘跳频图案,具有很高的时间-频率分辨率.分析表明,时频相关的捕获方法能有效地抑制交叉项、扩散信号分量,计算时采用模块化处理,运算量小.仿真结果表明,时频相关法能够满足对跳频信号快速跟踪、测频的要求.更多还原

【Abstract】 By way of research on the Cohen-class time-frequency distribution (TFD), the kernel functions and the time-frequency reassignment, a method of time-frequency correlation based on Cohen-Reassignment time-frequency distribution was presented to quicken the acquisition of frequency-hopping( FH ) sequence. The method could depict frequency-hopping sequence efficiently with higher resolution on time-frequency domain. The analysis shows that the method could reduce or completely remove the cross-terms and diffuse signal component, the computation could adopt module algorithm with lower computation complexity. And the simulation results show the method could satisfy for rapid tracking and acquisition of FH sequence.更多还原