Phase Difference Correcting Spectrum Method Based on All-phase Spectrum Analysis

Huang Xiang-dong; Wang Zhao-hua

doi:10.3724/SP.J.1146.2006.00804

Volume 30 Issue 2

Jan. 2011

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Article Navigation > Journal of Electronics & Information Technology > 2008 > 30(2): 293-297

Huang Xiang-dong, Wang Zhao-hua . Phase Difference Correcting Spectrum Method Based on All-phase Spectrum Analysis[J]. Journal of Electronics & Information Technology, 2008, 30(2): 293-297. doi: 10.3724/SP.J.1146.2006.00804

Citation:

Huang Xiang-dong, Wang Zhao-hua . Phase Difference Correcting Spectrum Method Based on All-phase Spectrum Analysis[J]. Journal of Electronics & Information Technology, 2008, 30(2): 293-297. doi: 10.3724/SP.J.1146.2006.00804

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Phase Difference Correcting Spectrum Method Based on All-phase Spectrum Analysis

doi: 10.3724/SP.J.1146.2006.00804

Received Date: 2006-06-12
Rev Recd Date: 2006-11-24
Publish Date: 2008-02-19

Abstract

Abstract

To estimate sinusoidal signals real frequency ,amplitude and original phase precisely under noisy circumstances, a novel phase difference correcting spectrum method which combines both all-phase FFT and conventional FFT is proposed. This technique is of low computation complexity and convenient. The frequency and amplitude estimation can be acquired by implementing simple operation on these two spectral analysis results at main spectral position, moreover the all-phase FFT phase- spectrum value at main spectral position can be directly viewed as the original phase without any correcting measures. Due to all-phase FFTs excellent property of inhibiting spectral leakage, the proposed method is also feasible in the cases of dense spectrum distribution. And the phase estimation error is very tiny in the 10#61485;7 resolution level with no noise added.

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References(1)

References

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