Abstract
Many classic chirp signal processing algorithms may show significant performance degradation when the signal-to-noise ratio (SNR) is low. To address this problem, this paper proposes a pre-filtering method in time-domain based on deep learning. Different from traditional signal filtering methods, the proposed denoising convolutional neural network (DCNN) is trained to recover the pure signal from the noisy signal as much as possible. Following denoising, we use two classic chirp signal parameter estimation algorithms to estimate the parameters of the DCNN output. The simulation results show that, compared with no DCNN processing, the parameter estimation accuracy is significantly improved. This is mainly due to the powerful pure signal extraction ability of DCNN, which can significantly improve the SNR and the accuracy of signal parameter estimation.
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The datasets generated during and/or analyzed during the current study are available from the corresponding author on reasonable request.
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This manuscript has benefited greatly from the constructive comments and helpful suggestions of the anonymous referees; the authors would like to express their deep gratitude to them.
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Funding was provided by National Natural Science Foundation of China Grant 11703027.
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Ben, G., Zheng, X., Wang, Y. et al. Chirp Signal Denoising Based on Convolution Neural Network. Circuits Syst Signal Process 40, 5468–5482 (2021). https://doi.org/10.1007/s00034-021-01727-4
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DOI: https://doi.org/10.1007/s00034-021-01727-4