Abstract:

he micro Doppler modulation induced by mechanical vibration or rotation of structures on a ground target is to be regarded as a unique signature of this target, which can be used for target detection and identification. It’s well known that the returned radar signal not only includes the micro motion target echo but also the strong ground clutter, so it’s difficult to extract its micro Doppler information. In order to solve this problem, the method of micro Doppler extraction based on dual channel SAR/DPCA technique is presented. First, the dual channel DPCA technique is utilized to cancel the ground clutter in the raw data domain and preserve the echo of the vibrating target, and then the mathematical expression of micro Doppler frequency is deduced in detail. Finally, a computer simulation combined with the time frequency analysis is given to verify the validity of the theoretical analysis and the proposed method.