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Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps
Joint Authors
Luo, Xiulian
Deng, Yunkai
Wang, Robert
Guo, Lei
Wang, Mingjiang
Source
International Journal of Antennas and Propagation
Issue
Vol. 2014, Issue 2014 (31 Dec. 2014), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2014-04-03
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Abstract EN
To simultaneously achieve two-dimensional high resolution and wide swath in synthetic aperture radar (SAR), azimuth MIMO structure combined with stepped-frequency chirp signals was developed via splitting the antenna into N subapertures.
During transmitting each subaperture transmits a chirp pulse at a different carrier frequency, while during receiving every subaperture receives the N scattered pulses at the same time.
Separating the N scattered pulses received by each subaperture and downlinking them to the ground yield N2 different signal paths.
Due to the dedicated network in the SAR system, the channel imbalance is inevitable.
To correct the channel imbalance, this paper presents an external calibration method, where the channel characteristics are estimated from the peak value of a strong point target for each channel.
Simulation and real raw data experiments are performed to validate the proposed method.
American Psychological Association (APA)
Luo, Xiulian& Deng, Yunkai& Wang, Robert& Guo, Lei& Wang, Mingjiang. 2014. Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps. International Journal of Antennas and Propagation،Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1035991
Modern Language Association (MLA)
Luo, Xiulian…[et al.]. Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps. International Journal of Antennas and Propagation No. 2014 (2014), pp.1-8.
https://search.emarefa.net/detail/BIM-1035991
American Medical Association (AMA)
Luo, Xiulian& Deng, Yunkai& Wang, Robert& Guo, Lei& Wang, Mingjiang. Correction of Channel Imbalance for MIMO SAR Using Stepped-Frequency Chirps. International Journal of Antennas and Propagation. 2014. Vol. 2014, no. 2014, pp.1-8.
https://search.emarefa.net/detail/BIM-1035991
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1035991