| 由已知幅度谱及部分采样点恢复信号与采样频率的关系 |
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| 引用本文： | 李衍达,宁波.由已知幅度谱及部分采样点恢复信号与采样频率的关系[J].清华大学学报(自然科学版),1988(4). |
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| 作者姓名： | 李衍达 宁波 |
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| 作者单位： | 自动化系
(李衍达)，自动化系 (宁波) |
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| 摘 要： | 恢复信号所需的已知采样点数占信号总长度的比例Ｐ与采样频率有关，在一定条件 下，提高采样频率，可使Ｐ远小于三分之一。已知的采样点可不限于从信号的第一点开 始，也不限于是一段连续的采样点。本文的研究结果扩大了信号重构方法的应用范围。 试验例子的计算机计算结果与理论分析相符。
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| 关 键 词： | 信号处理 信号重构 图象处理 信号分析 |
The Effect of Sampling Frequency in Signal Reconstruction from Spectral Magnitude and Some Samples |
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| Li Yanda,Ning Po.The Effect of Sampling Frequency in Signal Reconstruction from Spectral Magnitude and Some Samples[J].Journal of Tsinghua University(Science and Technology),1988(4). |
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| Authors: | Li Yanda Ning Po |
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| Institution: | Department of Automation |
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| Abstract: | A finite discrete signal can be uniquely reconstructed from its spectral magnitude (or phase function) and some samples under some restrictions. In this paper, it is shown that the ratio (P) of the number of known samples to the total number of the sequence is related to the sampling frequency. A relationship between the ratio (P) and the sampling frequency is presented. According to this relationship, the ratio (P) can be greatly decreased by raising the sampling frequency and the initial known sample is not confined to be the first sample of the sequence. Furthermore, the known samples are not confined to be successive. All these extend the field of application of signal reconstruction method. Examples are given. |
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| Keywords: | signal processing signal reconstruction image processing signal analysis |
| 本文献已被 CNKI 等数据库收录！ |
