Aiming at extracting the time-varying micro-Doppler feature of the vibrating target in ground clutter environment

the method of micro-Doppler extraction based on dual-channel ATI technique and Radon transform is presented.The ATI technique is utilized to suppress ground clutter and obtain the interferometric signal of the vibrating target

which is presented as a straight line along the azimuth direction in the range-compressed data domain.The Radon transform is utilized to detect the weak straight line and find out which range cell it locates at.And the mathematical expressions of micro-Doppler with different vibrating directions are derived and discussed in detail.Compared with the single-channel situation

it is no need to compensate for the Doppler shift caused by the radar's translation

and the target vibrating along the azimuth direction could be effectively detected

whose micro-Doppler presents remarkably nonperiodic feature.Simulated results verify the accuracy and availability of the proposed method.