A novel operation mode for spaceborne polarimetric SAR

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...

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Bibliographic Details
Published in:Science China. Information sciences 2011-04, Vol.54 (4), p.884-897
Main Authors: Qi, WeiKong, Yu, WeiDong
Format: Article
Language:English
Subjects:
Ambiguity
Antennas
Beamforming
Computer Science
Delay
Division
Elevation
Horizontal polarization
Information Systems and Communication Service
Mathematical analysis
Polarimetry
Polarization
Pulse repetition interval
Research Papers
Synthetic aperture radar
Vertical polarization
数字波束形成
极化SAR
极化合成孔径雷达
脉冲传输
脉冲重复间隔
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Summary: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 sub- pulse is transmitted with vertical polarization antenna to realize code division. After every sub-aperture receives returns from ground, SAlt 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.
ISSN:1674-733X
1869-1919
DOI:10.1007/s11432-011-4183-1