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A new method based on Hilbert-Huang transform (HHT) marginal spectrum is proposed to detect the Doppler signal and estimate the Doppler shift in this paper. This method first iteratively decompose the Doppler signal into a number of intrinsic mode functions (IMFs) Which are monocomponent. Then Hilbert transform is applied to each IMF to calculate Hilbert spectrum, and HHT marginal spectrum is obtained...
The Hilbert-Huang transform (HHT) is employed for chirp-like jammer excision in direct sequence spread spectrum (DSSS) communication systems in this paper. The proposed method iteratively decomposes the received signal into intrinsic mode functions (IMFs) and applies Hilbert transform to each IMF to yield Hilbert spectrum, by which the embedded jammer can be well localized in the time-frequency plane...
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