关键词: 信息处理技术, 旋转不变法, 转速测量, 刻槽, 多普勒

Abstract: 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.

Key words: technology of signal process, effect of spatial smoothing on state space methods, velocity-measurement, slot, Doppler