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| The Method of Sub-apertures Space-frequency Processing for the Single-channel SAR Moving Target Detection |
| Liu Shu-jun① Yuan Yun-neng② Mao Shi-yi② |
①(College of Communication Engineering Chongqing University, Chongqing 400044, China)
②(School of Electronics and Information Engineering, Beihang University, Beijing 100191, China) |
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Abstract The space-frequency processing of sub-apertures that obtained from the single-antenna airborne SAR is proposed for the moving target detection. First the process of how to gain the sub-apertures is presented through the azimuth frequency processing. The sub-apertures that resemble the multi-channel are formed. Then the equivalent property for the space-time signal of the sub-apertures is particular analyzed. The echo signals of the sub-apertures gained in different synthesized center times are equal to the echo signals obtained from the same time and the different space positions. The time delay of the sub-aperture is used to gain the space information and the two-dimension signal model of the sub-apertures is established. Learned from the method of using multi-channels to suppress the clutter, the space-frequency adaptive processing of the sub-apertures is presented to realize the moving target detection and the clutter suppression. Finally, the simulation results demonstrate that the method is effective.
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Received: 25 May 2009
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Corresponding Authors:
Liu Shu-jun
E-mail: liusj@cqu.edu.cn
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2010, Vol. 32 
