Projectile Speed Doppler Radar Signal Analysis

The measurements of projectile spin with Doppler radar is of some advantages ,such as simple implementation ,low cost and so on .By the way of carving chamfer in the bottom of projectile .resulting in projectile spin of modulating to electromagnetic .the Doppler signal will carry the spin signal ,then by spectrum analysis to Doppler signal ,we can get the projectile spin .First by the way of comparing with sorts of measurements of projectile spin existed , This article introduces the background of this thesis comprehensively ; and then expatiates the basic theory of measurements of projectile spin with Doppler radar comprehensively , and establishes the ideal model of modulation of Doppler signal; and next by the way of analyzing the time complexity of The Fast Fourier Transform , including The Two-Radix , The Four-Radix and The Split-Radix algorithm , gets at the Split-Radix algorithm adapting to Doppler spin signal processing ; and then researches the theorem and procedure of filter designing by the way of The Window Method , and by band-pass filter which coagulates by low-pass filter filters signal , and how to filter in spectrum field by artificial filter; and then analyzes the effect of interception to frequency resolution ; and last emulate the Doppler signal of spin projectile , and by the way of application program which programmed through the method discussed, calculates an instance to verify the method dependability .