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A novel operation mode for spaceborne polarimetric SAR

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Abstract

A novel operation mode for spaceborne polarimetric SAR, named polarization space-division adding polarization code-division (PSD-PCD) operation mode, is proposed in this paper through combining polarimetric SAR with elevation digital beam-forming (DBF) on receive. In a pulse repetition interval the up-chirp LFM sub-pulse is transmitted with horizontal polarization antenna, and with some delay the down-chip LFM subpulse is transmitted with vertical polarization antenna to realize code division. After every sub-aperture receives returns from ground, SAR system uses range DBF to separate echoes relative to different sub-pulses in order to realize space division. The system PRF is equal to that of single-polarization SAR, and elevation DBF help reduce range ambiguity effectively. Moreover, the main system parameters, including PRF, delay between two sub-pulses, radar equation and ambiguity are analyzed and compared with those of single-polarization SAR. Simulation results demonstrate the feasibility and validity of PSD-PCD operation mode.

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Authors and Affiliations

  1. Institute of Electronics, Chinese Academy of Sciences, Beijing, 100190, China

    WeiKong Qi & WeiDong Yu

  2. Graduate School of Chinese Academy of Sciences, Beijing, 100039, China

    WeiKong Qi & WeiDong Yu

Authors
  1. WeiKong Qi
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  2. WeiDong Yu
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Correspondence to WeiKong Qi.

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Qi, W., Yu, W. A novel operation mode for spaceborne polarimetric SAR. Sci. China Inf. Sci. 54, 884–897 (2011). https://doi.org/10.1007/s11432-011-4183-1

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  • DOI: https://doi.org/10.1007/s11432-011-4183-1

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