EM-driven Stereo-like Gaussian Chirplet Mixture Estimation

Weruaga, Luis; Képesi, Marián

doi:10.1109/icassp.2005.1416048

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…But L is a small number, and the additional computation cost is not obvious [26]. For the Chirplet decomposition, many other methods have been proposed, and they are efficient in a particular kind of application [23, 27, 36–41]. In [42–43], the modified version of the Chirplet was proposed, but it requires multi‐dimensional maximizations.…”

Section: Resultsmentioning

confidence: 99%

Approach for high‐resolution inverse synthetic aperture radar imaging of ship target with complex motion

Wang

Jiang

2013

IET signal process.

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High-resolution inverse synthetic aperture radar (ISAR) imaging of ship target has attracted the attention of many scholars all around the world. For the complex motion of the ship, the Doppler frequency shifts of the scatterers are actually time-varying, and the received signals in a range bin can be characterised as multi-component amplitude-modulated and frequency-modulated (AM-FM) signals. In this study, the AM-FM signals are approximated as a weighted sum of multiple Chirplets, and a novel approach for high-resolution ISAR imaging of ship target based on the product cubic phase function (PCPF) for Chirplet decomposition is proposed. The PCPF algorithm can reduce the cross-terms between different Chirplet components, and combined with the range-instantaneous-Doppler technique, the high-resolution instantaneous ISAR images can be obtained. Results of simulated and real data demonstrate the effectiveness of the method proposed.

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Section: Resultsmentioning

confidence: 99%

Approach for high‐resolution inverse synthetic aperture radar imaging of ship target with complex motion

Wang

Jiang

2013

IET signal process.

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Some problems of analyzing bio-sonar echolocation signals generated by echolocating animals living in the water and in the air

Gudra

Herman

2008

The Journal of the Acoustical Society of America

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In this paper some similarities and differences of bio-sonar echolocation signals generated in the water and in the air are presented. The echolocation cues of marine mammals and bats are usually frequency and amplitude signals modulated simultaneously. The main problems of the analysis of such type of signals are envelope detecting and time-frequency decomposition. In this paper some digital signal processing (DSP) algorithms that may be used to analyze this type of signals are presented. The basic linear spectrogram (STFS), the nonlinear Winger-Vill'e spectrogram and some time-scale representations of signals using wavelets methods of estimation of the frequency modulation function have been compared. An analysis of possibilities for acoustic identification of particular species of bats by means of echolocation is also presented.

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EM-driven Stereo-like Gaussian Chirplet Mixture Estimation

Cited by 2 publications

References 7 publications

Approach for high‐resolution inverse synthetic aperture radar imaging of ship target with complex motion

Approach for high‐resolution inverse synthetic aperture radar imaging of ship target with complex motion

Some problems of analyzing bio-sonar echolocation signals generated by echolocating animals living in the water and in the air

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