Multi-frequency real signal frequency estimator based on gradually controllable frequency offset range

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Journal of Vibration and Shock ›› 2024, Vol. 43 ›› Issue (17) : 12-18.

HUANG Xiangdong1, L Chong1, LI Yanping1, WANG Xiaolei2

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Abstract

Multi-tone real signal frequency estimation is a fundamental signal processing problem with a wide range of applications. Its accuracy is limited by the difficulty of reducing the inter-spectral interference of frequency components. To fundamentally solve this problem, this paper proposes a multi-tone real signal frequency estimator that can automatically suppress inter-spectral interference. Specifically, it is based on a single-tone frequency estimator with controlling frequency offset range; two residual signals (i.e., descending residual and exclusive residual) are iteratively constructed and fed into the single-tone frequency estimator to obtain the frequency estimation results of each component. The characteristic of this estimator is that the frequency offset range parameter can be progressively set during the iteration process, ensuring that each component can steadily obtain high-precision estimation results. The numerical results demonstrate that the accuracy of the proposed multifrequency estimator is higher than that of existing methods and has broad application prospects.

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Frequency estimation / multi-tone real signals / spectral leakage shrinking / controlling frequency offset range / inter-spectral interference

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HUANG Xiangdong1, L Chong1, LI Yanping1, WANG Xiaolei2. Multi-frequency real signal frequency estimator based on gradually controllable frequency offset range[J]. Journal of Vibration and Shock, 2024, 43(17): 12-18

References

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