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This paper proposes an improved Doppler Beam Sharpening (DBS) algorithm for missile-borne Synthetic Aperture Radar (SAR) based on Doppler localization equations, to gain a better azimuth resolution and reduce the heavy localization computation afford. Firstly, the azimuth resolution is improved by a modified reference function, with little extra computation. Then Doppler localization equations are...
This paper focuses on radar Doppler signatures of pedestrian. Firstly, an improved human walking model which describes a pedestrian as a linear-rigid target is introduced. Then radar echoes of the pedestrian under the condition of continuous wave (CW) radar signal are acquired, formulas of instantaneous Doppler are derived and movement signatures of the target are analyzed. Simulation experiments...
The paper derives the two-dimensional point target spectrum for general bistatic SAR configuration. For the kind of configuration the contributions of transmitter and receiver to the overall instantaneous Doppler frequency are unequal due to the different slant range history. In the paper the instantaneous Doppler contribution ratio is proposed to represent the difference of instantaneous Doppler...
An algorithm for achieving High-resolution wide-swath (HRWS) images in bistatic space-borne SAR with multiple phase centers is presented. Based on the analysis of the correlation of echos from all phase centers, a signal model is built that all echoes combined form a periodically nonuniform undersampled signal. Then the echoes with Doppler ambiguities are reconstructed to unambiguous uniform samplings...
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