Abstract
Micro-motion feature is one of the effective features used for radar target recognition in the middle section of the ballistic curve. The micro-Doppler expressions of the scattering center at the conical point and two sliding scattering centers in the conical bottom are given, firstly. Then by analyzing the micro-Doppler expressions, it is found that only the precession frequency can be estimated from the micro-Doppler expressions, and other parameters can’t be estimated directly. But all precession and geometry parameters can be estimated by decreasing the number of parameters in the micro-Doppler expressions of two sliding scattering centers, which must use two groups of echoes illuminating the same warhead target from the cone top and the cone bottom. Finally, a new method of estimating all precession and geometry parameters is proposed, and it is validated by the simulation analysis.
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