title: ISAR Imaging Based on the Wideband Hyperbolic Frequency-Modulation Waveform.
abstract: The hyperbolic frequency-modulated (HFM) waveform has an inherent Doppler-invariant property. It is more conducive than the conventional linear frequency-modulated (LFM) waveform to high speed moving target imaging. In order to apply the HFM waveform to existing inverse synthetic aperture radar (ISAR) imaging systems, a new pulse compression algorithm is proposed. First, the received HFM echoes are demodulated with the transmitted signal, which is called "decurve" in this paper. By this operation, the bandwidth of the demodulated echoes is effectively reduced and can be processed by the existing narrow-band receiver. Then, the phase of the decurved HFM echoes is analyzed, and thus, the pulse compression is accomplished by space-variant phase compensation. In addition, the space-variant phase compensation is realized by resampling and fast Fourier transform (FFT) with high computational efficiency. Finally, numerical results illustrate the effectiveness of the proposed method.
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. zhouw06@mails.tsinghua.edu.cn.
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.affiliation: Beijing Institute of Radio Measurement, Beijing 100039, China. chunmaoyeh@gmail.com.
authors.forename: Chun-mao
authors.initials: CM
authors.lastname: Yeh
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. kevincabbage@sina.com.
authors.forename: Kan
authors.initials: K
authors.lastname: Jin
authors.affiliation: Department of Electronic Engineering, Tsinghua University, Beijing 100084, China. yangjian_ee@mail.tsinghua.edu.cn.
authors.forename: Jian
authors.initials: J
authors.lastname: Yang
authors.affiliation: Beijing Institute of Radio Measurement, Beijing 100039, China. luyaobing65@163.com.
authors.forename: Yao-bin
authors.initials: YB
authors.lastname: Lu
keywords: Doppler invariant; hyperbolic frequency modulated (HFM); inverse synthetic aperture radar (ISAR); linear frequency modulated (LFM); pulse compression