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| Research on SAR/GMTI Using ΣΔ-Beams Based on Signal Subspace Processing |
| Shen Ming-wei; Zhu Dai-yin; Zhu Zhao-da; Ye Shao-hua |
| College of Information Science and Technology, Nanjing University of Aeronautics & Astronautics, Nanjing 210016, China |
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Abstract In this paper, a GMTI method for ΣΔ-beams is investigated, which is achieved by incorporating the along-track interferometric SAR/ GMTI technique with signal subspace processing. The principle of along-track interferometric SAR/ GMTI is analyzed, and the spatial cancellation matrix used to preprocess the Σ image is derived. In practice, because of the channel errors (gain and phase error), a two-dimensional signal subspace processing method is used, which can blindly calibrate the sensors error and achieve the moving targets detection. The simulation results are presented to demonstrate the validity of this scheme.
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Received: 11 March 2005
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2007, Vol. 29 
