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To solve this problem, a nonlinear frequency modulation (nlfm) waveform with a concave quadratic frequency function is provided, which combines the tfm to increase signal noise ratio (snr) and detection depth of cfrp composites. Through this framework, an advanced nonlinear frequency modulation (nlfm) waveform with lower sidelobes and a smaller main lobe, which can significantly relieve the restriction of very limited satellite power, is constructed.

Ocalel2 May 09, 2026

This paper proposes the application of nonlinear frequency modulation (nfm) thermography to detect delamination defects in carbon fibre reinforced polymer (cfrp) composites For the radar ambiguity function calculation the zak transform is used in the method. An ultrasonic detection method based on the ht integrated with improved vmd for cfrp laminates with delamination defects xu zhang, congxiao xu, yan fang, wei li