中文摘要：

介绍了连续波测速雷达测量旋转弹丸转速的方法,并对底部刻槽弹丸的RCS和转速计算进行了理论分析,推导出转速计算公式,然后运用现代超分辨谱估计的旋转不变法代替传统的FFT算法对回波信号进行频谱估计,并在不同信噪比下对其频谱估计能力进行了仿真计算和实验测试,给出了信噪比与测量误差之间的关系曲线。结果表明：在相同信噪比的情况下,该高精度转速测量方法相比传统FFT算法,测试精度明显提高。

英文摘要：

To measure the rotating velocity of the flying bullet,this paper analyzes the RCS of the bullet with slot first,and adopts the modern spectral estimation of the ＇effect of spatial smoothing on state space methods＇（ESPRIT） to replace the general FFT.Simulations and tests under different SNRs evaluate the spectral estimation performance of this new method proposed in this paper,and the relations between measurement error and SNR are obtained.The results show that the method improves the precision of velocity-measurement greatly.