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In radar sensing and imaging, the azimuth resolution is a main concern, which is limited by the antenna aperture, and as a result the targets within the beam cannot be distinguished. By enhancing the diversity of radiation, radar can obtain additional information for resolution. In this paper, a high-resolution staring imaging technique named radar coincidence imaging (RCI) is investigated. Originated...
Radar coincidence imaging (RCI) is a high-resolution staring imaging technique, which is fit for sparse recovery natively. The performance of RCI depends on the coherence property of dictionary matrix. In this paper, RCI using frequency-hopping (FH) waveforms is considered, and a FH code design method optimizing the dictionary matrix is introduced. First, the waveform optimization object function...
Radar coincidence imaging (RCI) is a high-resolution and instantaneous imaging technique without the limitation of relative motion between target and radar. In sparse-based RCI, the assumption that the scatterers are located at the pre-discretized grid-cell centers is commonly used. However, the generally existent off-grid degrades the imaging performance considerably. In this paper, the algorithm...
As a novel staring imaging technique, radar coincidence imaging (RCI) shows great potentials in various applications. However, the array position error, exists in array radar generally, has a bad influence on RCI and impairs the imaging performance extremely. In this paper, the mathematical model of RCI in the presence of array position error is established and to obtain the analytic result, the nonlinear...
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