A Novel sinc Interpolation for Continuous PRF Sampled Sequences Reconstruction in Spotlight SAR

CHEN Shiyang; HUANG Lijia; YU Lei

doi:10.12000/JR18095

Volume 8 Issue 4

Aug. 2019

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Article Navigation > Journal of Radars > 2019 > 8(4): 527-536

Xing Xiang-wei, Ji Ke-feng, Kang Li-hong, Zhan Ming. Review of Ship Surveillance Technologies Based on High-Resolution Wide-Swath Synthetic Aperture Radar Imaging[J]. Journal of Radars, 2015, 4(1): 107-121. doi: 10.12000/JR14144

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CHEN Shiyang, HUANG Lijia, and YU Lei. A novel sinc interpolation for continuous PRF sampled sequences reconstruction in spotlight SAR[J]. Journal of Radars, 2019, 8(4): 527–536. doi: 10.12000/JR18095

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A Novel sinc Interpolation for Continuous PRF Sampled Sequences Reconstruction in Spotlight SAR

DOI: 10.12000/JR18095

CHEN Shiyang^{1,2,3,4
,},
HUANG Lijia^{1,2
,
,},
YU Lei^4
,

①.
Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
②.
Key Laboratory of Technology in Geo-Spatial Information Processing and Application System, Institute of Electronics, Chinese Academy of Sciences, Beijing 100190, China
③.
School of Electronic, Electrical and Communication Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
④.
School of Electronics and Information Engineering, Beihang University, Beijing 100191, China

Funds: The National Science Foundation of China (61331017)

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Corresponding author: HUANG Lijia, iecas8huanglijia@163.com
Received Date: 2018-11-14
Rev Recd Date: 2019-02-22
Publish Date: 2019-08-28

Abstract

Abstract

This paper focuses on an improved imaging-algorithm for the spotlight Synthetic Aperture Radar (spotlight SAR) with continuous Pulse Repetition Frequency (PRF) variation in extremely high-resolution imaging-process. PRI variation is conventionally employed to resolve the problem of fixed blind ranges as well as the conflict of high-resolution and wide-swath; however, there are problems such as spectrum aliasing and ambiguous targets caused by nonuniform sampling. In this study, a novel sinc interpolation method is proposed to reconstruct a uniformly sampled signal from non-uniform Fourier Transform samples. Then a two-step processing approach combined with the novel sinc interpolation method is presented in the process of non-uniformly sampled echo imaging. The simulation proves the validity and accuracy of the proposed imaging algorithm. In addition, the computational cost of the novel sinc interpolation is further reduced compared to that of non-uniform Fourier transformation.
- Spotlight SAR,
- Modified sinc-interpolation,
- PRF Variation,
- High resolution,
- Wide swath

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References(16)

References

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