Please use this identifier to cite or link to this item: http://localhost/handle/Hannan/590593
Title: First Demonstration of Airborne SAR With Nonlinear FM Chirp Waveforms
Authors: Wei Wang;Robert Wang;Zhimin Zhang;Yunkai Deng;Ning Li;Lili Hou;Zhihuo Xu
subject: synthetic aperture radar (SAR)|sidelobe reduction|signal-to-noise ratio (SNR)|range migration algorithm (RMA)|Nonlinear frequency-modulation (NLFM) chirp
Year: 2016
Publisher: IEEE
Abstract: For synthetic aperture radar (SAR), a system impulse response with low sidelobes is very important because sidelobes may interfere with the nearby scatterers and contribute to multiplicative noise. It is well known that a nonlinear frequency-modulation (NLFM) chirp waveform can shape the signal's power spectral density and provide a radar matched filter output with lower sidelobes without loss of the signal-to-noise ratio when compared with the linear frequency-modulation chirp. These advantages make the NLFM waveform to be a promising candidate to improve the imaging quality for SAR. However, so far, to our knowledge, there is no real application of NLFM waveforms for SAR. This letter, for the first time, demonstrates the airborne SAR experiment using an NLFM waveform. In the underlying experiment, the construction of the NLFM signal is investigated and a modified range migration algorithm (RMA) is developed to adapt it for focusing the NLFM SAR data. Both simulation and experimental results exhibit the promising power of the NLFM chirp and show the accuracy of the proposed modified RMA.
URI: http://localhost/handle/Hannan/173529
http://localhost/handle/Hannan/590593
ISSN: 1545-598X
1558-0571
volume: 13
issue: 2
Appears in Collections:2016

Files in This Item:
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Title: First Demonstration of Airborne SAR With Nonlinear FM Chirp Waveforms
Authors: Wei Wang;Robert Wang;Zhimin Zhang;Yunkai Deng;Ning Li;Lili Hou;Zhihuo Xu
subject: synthetic aperture radar (SAR)|sidelobe reduction|signal-to-noise ratio (SNR)|range migration algorithm (RMA)|Nonlinear frequency-modulation (NLFM) chirp
Year: 2016
Publisher: IEEE
Abstract: For synthetic aperture radar (SAR), a system impulse response with low sidelobes is very important because sidelobes may interfere with the nearby scatterers and contribute to multiplicative noise. It is well known that a nonlinear frequency-modulation (NLFM) chirp waveform can shape the signal's power spectral density and provide a radar matched filter output with lower sidelobes without loss of the signal-to-noise ratio when compared with the linear frequency-modulation chirp. These advantages make the NLFM waveform to be a promising candidate to improve the imaging quality for SAR. However, so far, to our knowledge, there is no real application of NLFM waveforms for SAR. This letter, for the first time, demonstrates the airborne SAR experiment using an NLFM waveform. In the underlying experiment, the construction of the NLFM signal is investigated and a modified range migration algorithm (RMA) is developed to adapt it for focusing the NLFM SAR data. Both simulation and experimental results exhibit the promising power of the NLFM chirp and show the accuracy of the proposed modified RMA.
URI: http://localhost/handle/Hannan/173529
http://localhost/handle/Hannan/590593
ISSN: 1545-598X
1558-0571
volume: 13
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7377041.pdf1.63 MBAdobe PDFThumbnail
Preview File
Title: First Demonstration of Airborne SAR With Nonlinear FM Chirp Waveforms
Authors: Wei Wang;Robert Wang;Zhimin Zhang;Yunkai Deng;Ning Li;Lili Hou;Zhihuo Xu
subject: synthetic aperture radar (SAR)|sidelobe reduction|signal-to-noise ratio (SNR)|range migration algorithm (RMA)|Nonlinear frequency-modulation (NLFM) chirp
Year: 2016
Publisher: IEEE
Abstract: For synthetic aperture radar (SAR), a system impulse response with low sidelobes is very important because sidelobes may interfere with the nearby scatterers and contribute to multiplicative noise. It is well known that a nonlinear frequency-modulation (NLFM) chirp waveform can shape the signal's power spectral density and provide a radar matched filter output with lower sidelobes without loss of the signal-to-noise ratio when compared with the linear frequency-modulation chirp. These advantages make the NLFM waveform to be a promising candidate to improve the imaging quality for SAR. However, so far, to our knowledge, there is no real application of NLFM waveforms for SAR. This letter, for the first time, demonstrates the airborne SAR experiment using an NLFM waveform. In the underlying experiment, the construction of the NLFM signal is investigated and a modified range migration algorithm (RMA) is developed to adapt it for focusing the NLFM SAR data. Both simulation and experimental results exhibit the promising power of the NLFM chirp and show the accuracy of the proposed modified RMA.
URI: http://localhost/handle/Hannan/173529
http://localhost/handle/Hannan/590593
ISSN: 1545-598X
1558-0571
volume: 13
issue: 2
Appears in Collections:2016

Files in This Item:
File Description SizeFormat 
7377041.pdf1.63 MBAdobe PDFThumbnail
Preview File