基于短时傅立叶变换的跳频序列瞬时频率估计  

Instantaneous frequency estimation of the sequence of hopping frequency based on short-time Fourier transform

作　　者：陈亮[1] 尉宇[1] 张涛[1] 

机构地区：[1]武汉科技大学信息科学与工程学院,武汉430081

出　　处：《信息技术》2006年第11期48-50,共3页Information Technology

摘　　要：采用了G函数的方法来模拟跳频序列,然后利用短时傅立叶变换对它进行分析与瞬时频率的估计。该方法能够有效地描绘出跳频信号的频率随时间跳变的规律(跳频图案),具有很高的时间-频率分辨率。计算机仿真验证了应用短时傅立叶变换分析跳频序列的有效性和实用性。This paper uses the method of the function of G to imitate to the sequence of hopping - frequency, then makes use of short- time Fourier transform to carry on the analysis and instantaneous frequency estimation. The analysis method could plot the time- frequency relation efficiently, and it has higher resolution on the time - frequency domain. The computer simulations are presented demonstrating the capabilities of the analysis method based on short- time Fourier transform.

关 键 词：跳频序列 G函数 短时傅立叶变换 瞬时频率估计 

分 类 号：TN919.5[电子电信—通信与信息系统]