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Confirmation of Radar signals' pulse repetition frequency (PRF) is an important job for electronic intelligence reconnaissance. For space-borne SAR, different work mode is corresponding to different pulse repetition frequency. As a result, the confirmation of PRF can supply intelligence support for work mode reconnaissance. In this paper, a new estimation algorithm based on local wave decomposition...
Recognition of Synthetic Aperture Radar (SAR) operation mode plays an important role in SAR countermeasure, and possesses quite significant sense in both theory and applications. Characteristics of three different SAR operation modes are analyzed in detail and the Doppler history of SAR signal is concerned. An algorithm by extracting Doppler Centroid with time frequency distribution (TFD) is proposed...
Resolution is the most important parameter to measure the radar images quality. In this paper, a method of improving azimuth resolution based on spectrum synthesis under line formation flying satellites SAR condition is studied, and the relationship between baseline of formation flying satellites SAR and azimuth resolution is analyzed. We obtain the relationship between baseline and synthetic aperture...
In order to give rational indexes of anti-SAR equipment in position protection, this paper brings forward the concepts of max admissible response time and max admissible sensitivity which are detailed analyzed and modeled. Meanwhile, the power of coherent jamming is computed. Test results show the rationality and feasibility of the models.
Space-borne synthetic aperture radar is widely used in the military field. To counter space-borne SAR, it is necessary to estimate the parameters of space-borne SAR in real-time. After Receiving the signals of SAR, fractional Fourier transform is applied to both single pulse and pulse train, which can estimate the parameters in real-time. Theory analysis and Numerical simulation show this method has...
With the rapid development of information technology, the battlefield environment is becoming more and more complex and emitter platform recognition becomes more and more difficult. Multi-sensorpsilas data fusion is a very important mean. This paper first proposes an electronic and SAR imagery reconnaissance data fusion system scheme, and then presents a viable method for platform recognition based...
A synthetic aperture radar (SAR) data reformatting approach named Doppler Keystone transform (DKT) is proposed to correct the range migration of the moving target. By combining the DKT and the Doppler phase compensation methods, the moving target can be well imaged in high signal-clutter-ratio (SCR) case. Moreover, the DKT-based algorithm is suitable for parallel implementation.
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