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Xuehui He
Xidian University
AlgorithmParametric statisticsComputer visionMathematicsFast Fourier transform
5Publications
3H-index
73Citations
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Publications 6
Newest
#1Jiancheng ZhangH-Index: 5
#2Yanyan Li (Northwest University (United States))
Last. Xuehui HeH-Index: 3
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This paper proposes an integrated time-frequency rate distribution (TFRD) technique, i.e., coherently integrated trilinear autocorrelation function (CITAF), for the detection and parameter estimation of quadratic frequency modulated (QFM) signal embedded in white Gaussian noise. The basic idea is to design a trilinear autocorrelation function (TAF) enabling a coherent integration of the signal energy in both of the time and lag-time domains. Theoretical analysis and numerical simulations show th...
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#1Jiancheng Zhang (Xidian University)H-Index: 5
#2Tao Su (Xidian University)H-Index: 4
Last. Xuehui He (Xidian University)H-Index: 3
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A novel algorithm for parameter estimation of cubic frequency modulated (CFM) signals, known as a modified integrated cubic phase function high-order ambiguity function (MICPF-HAF), is introduced. The MICPF-HAF demodulates CFM signals to quadratic FM (QFM) signals via phase differentiation, and then the MICPF is applied to realise the parameter estimation of QFM signals. The analyses and simulations show that the proposed MICPF-HAF achieves a great improvement in anti-noise performance in compar...
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#1Jiancheng Zhang (Xidian University)H-Index: 5
#2Tao Su (Xidian University)H-Index: 11
Last. Xuehui He (Xidian University)H-Index: 3
view all 4 authors...
The detection performance of radar maneuvering target with jerk motion is affected by the range migration (RM) and Doppler frequency migration (DFM). To address these problems, a fast algorithm without searching target's motion parameters is proposed. In this algorithm, the second-order keystone transform is first applied to eliminate the quadratic coupling between the range frequency and slow time. Then, by employing a new defined symmetric autocorrelation function, scaled Fourier transform, an...
18 CitationsSource
#1Yanyan Li (Xidian University)H-Index: 2
#2Tao Su (Xidian University)H-Index: 11
Last. Xuehui He (Xidian University)H-Index: 3
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For targets with complex motions, such as highly maneuvering airplanes and ships fluctuating with oceanic waves, the Doppler frequencies of scatterers are actually time-varying and azimuth echoes of a range cell have to be modeled as multicomponent cubic phase signals (CPSs) after the range alignment and the phase adjustment. In inverse synthetic aperture radar (ISAR) imaging based on the CPS model, the chirp rate and the quadratic chirp rate are identified as causes of the image defocus. In thi...
15 CitationsSource
#1Jibin Zheng (Xidian University)H-Index: 13
#2Tao Su (Xidian University)H-Index: 11
Last. Qian Liu (Duke University)H-Index: 84
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In this paper, by employing the symmetric autocorrelation function and the scaled inverse Fourier transform (SCIFT), a coherent detection algorithm is proposed for high-speed targets. This coherent detection algorithm is simple and can be easily implemented by using complex multiplications, the fast Fourier transform (FFT) and the inverse FFT (IFFT). Compared to the Hough transform and the keystone transform, this coherent detection algorithm can detect high-speed targets without the brute-force...
37 CitationsSource
#1Jibin ZhengH-Index: 13
#2Wentao ZhuH-Index: 5
Last. Xuehui HeH-Index: 3
view all 4 authors...
3 CitationsSource
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