| 具有迭代结构的时频分布计算方法 |
| |
| 引用本文： | 李滔,汤建龙,杨绍全.具有迭代结构的时频分布计算方法[J].电路与系统学报,2006,11(3):96-100,95. |
| |
| 作者姓名： | 李滔 汤建龙 杨绍全 |
| |
| 作者单位： | 西安电子科技大学,电子工程学院,陕西,西安,710071 |
| |
| 基金项目： | 国防预研资助项目（41101030103） |
| |
| 摘 要： | 本文讨论了时频分布中的迭代算法的问题.通过选择特殊的计算窗口,时频分布的迭代运算形式能够有效地利用前面数据段的分析结果,从而避免了重复性的运算,使得计算效率得到提高.本文对原有的利用单边窗口的时频分布迭代算法的性能进行了分析,提出了采用对称型窗口的迭代计算形式.与单边窗口相比,双边形式的计算窗口不但可以有效地提高时频表示精度,同时还能够更为准确的表示信号的瞬时频率.文章对各项理论分析结果提供了相应的仿真实验结果.
|
| 关 键 词： | 迭代算法 时频分布 指数遗忘分布 |
| 文章编号： | 1007-0249（2006）03-0096-05 |
| 收稿时间： | 2003-12-26 |
| 修稿时间： | 2004-04-21 |
Computationally efficient time-frequency distribution with recursive structure |
| |
| LI Tao,TANG Jian-long,YANG Shao-quan.Computationally efficient time-frequency distribution with recursive structure[J].Journal of Circuits and Systems,2006,11(3):96-100,95. |
| |
| Authors: | LI Tao TANG Jian-long YANG Shao-quan |
| |
| Abstract: | This paper discusses the application of iteration algorithm in time-frequency representation. With special computational window, recursive operations can be introduced which incorporate knowledge of the time-frequency distribution from previous data blocks into the current estimate and greatly increase the computation efficiency. The analysis shows that compared with time-frequency distributions using single-sided window, those with symmetrical computational window could improve the resolution and have more accurate representation of the instantaneous frequency. Finally corresponding simulations are provided. |
| |
| Keywords: | recursive operation time-frequency distribution exponentially forgetting transform |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
