| Qin Qiang (秦强),Jiang Zhinong,He Wei,Feng Kun.[J].高技术通讯(英文),2011,17(1):106~111 |
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| Timedelay based all-frequency correction method for discrete spectrum |
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| DOI： |
| 中文关键词: |
| 英文关键词: signal analysis， fault diagnosis， discrete spectrum， low frequency， spectrum correction |
| 基金项目: |
| Author Name | Affiliation | | Qin Qiang (秦强) | | | Jiang Zhinong | | | He Wei | | | Feng Kun | |
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| 中文摘要: |
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| 英文摘要: |
| Many spectrum correction methods have been developed, but their performance degrades significantly when they are applied to the correction of low frequency component (LFC). It owns to that the model underlying the conventional approaches neglects the interference of the negative frequency in the real signal. A new approach for the correction of the LFC is proposed, which suits all kinds of symmetrical windows. It divides a signal into three sections and makes use of the first spectrum line of each section. Then this approach is modified so that it is also applicable to the correction of the high frequency component. Thus a timedelay-based all-frequency correction method is proposed. The simulation results show that this method is simple and feasible. By this method, the accurate frequency, amplitude and phase of the spectral line can be obtained whether it is close to or far from 0Hz. |
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