DSP-based harmonic expansion preprocessing for high-precision frequency estimation

Guangyu Gao; Naijin Liu

doi:10.1117/12.2565379

17 April 2020 DSP-based harmonic expansion preprocessing for high-precision frequency estimation

Guangyu Gao, Naijin Liu

Proceedings Volume 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications; 1145582 (2020) https://doi.org/10.1117/12.2565379
Event: Sixth Symposium on Novel Photoelectronic Detection Technology and Application, 2019, Beijing, China

Abstract

A digital harmonic expansion (DHE) method is proposed for high-precision frequency estimation. DHE is a preprocessing procedure before frequency estimation, which synthetizes a specific harmonic component of the fundamental frequency ofthe input signal to increase information content in spectral domain instead of sampling time length in time domain. This method can greatly improve the frequency estimation precision by using a simple FFT-based algorithm, which is also compatible with other existing FFT-based high-precision complex estimation algorithms. It has the potential for a variety of application scenarios, such as Radar/LIDAR, spectrum sensing, vibration measurement and electronic reconnaissance.

Citation Download Citation

Guangyu Gao and Naijin Liu "DSP-based harmonic expansion preprocessing for high-precision frequency estimation", Proc. SPIE 11455, Sixth Symposium on Novel Optoelectronic Detection Technology and Applications, 1145582 (17 April 2020); https://doi.org/10.1117/12.2565379

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