Radial velocity estimation used in wide-band radar systems is investigated. By analyzing the signal of cross-correlation output of adjacent echoes, it is found that the frequency and phase of the cross-correlation output are related to the target's radial velocity. Since the precision of the phase estimation is higher than that of the frequency, a phase-based velocity estimator is proposed. However, the ambiguity problem exists in the phase estimators, and thus the estimation of the cross-correlation of adjacent echoes (CCAE) is used to calculate the ambiguity number. The root-mean-square-error (RMSE) of the proposed estimator is derived. Simulation results show that the performance of the proposed method is better than that of the frequency-based estimator.

中文翻译：

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宽带雷达系统的高精度相域径向速度估计

研究了用于宽带雷达系统的径向速度估计。通过分析相邻回波互相关输出的信号，发现互相关输出的频率和相位与目标的径向速度有关。由于相位估计的精度高于频率，因此提出了一种基于相位的速度估计器。然而，相位估计器中存在模糊度问题，因此使用相邻回波互相关(CCAE)的估计来计算模糊度数。推导出所建议的估计器的均方根误差 (RMSE)。仿真结果表明，该方法的性能优于基于频率的估计器。