| 瞬时频率和时频分布 |
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| 引用本文： | 金梁, 殷勤业, 姚敏立. 瞬时频率和时频分布[J]. 电子与信息学报, 1998, 20(5): 597-603. |
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| 作者姓名： | 金梁 殷勤业 姚敏立 |
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| 作者单位： | 西安交通大学电信学院信息工程研究所，西安交通大学电信学院信息工程研究所，西安交通大学电信学院信息工程研究所 西安 710049，西安 710049，西安 710049 |
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| 基金项目： | 国家教委跨世纪优秀人才基金，国防重点实验室基金 |
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| 摘 要： | 本文首先介绍了瞬时频率(IF)的概念和IF的传统计算方法解析信号法,然后从联合时频分析的角度讨论了IF的物理含义及其与时频分布之间的联系,指出二维时频分布的任务之一是对IF进行估计,并且通过对几种时频分布估计性能的比较说明分布形式的选择对估计效果有较大影响。最后,本文提出并初步论证了自适应旋转投影分解法(AOP)计算IF的有效性。
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| 关 键 词： | 瞬时频率 时频分布 自适应信号处理 |
| 收稿时间： | 1997-06-05 |
| 修稿时间： | 1998-01-04 |
INSTANTANEOUS FREQUENCY AND TIME-FREQUENCY DISTRIBUTIONS |
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| Jin Liang, Yin Qinye, Yao Minli. INSTANTANEOUS FREQUENCY AND TIME-FREQUENCY DISTRIBUTIONS[J]. Journal of Electronics & Information Technology, 1998, 20(5): 597-603. |
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| Authors: | Jin Liang Yin Qinye Yao Minli |
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| Affiliation: | Institute of Information Engineering Xi'an Jiaotong University Xi'an 710049 |
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| Abstract: | The concept of instantaneous frequency(IF) and its traditional construct method- analytic method are introduced in this paper. Then by means of joint time-frequency analysis, the physical meaning of IF and its relation with the time-frequency distributions are also discussed. It is pointed out that one of the destinations of 2-D time-frequency distributions is to estimate the IF, and the different distribution can be of different effect. The performances of several popular distributions are compared, consequently AOP method is found to be a suitable one to estimate the IF. |
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| Keywords: | Instantaneous frequency Time-frequency distribution Adaptive signal processing |
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