The effective use of polarization information can improve the precision of target feature extraction and recognition.Aiming at the problem of extracting the micro-Doppler frequency of micro-motion targets

after introducing the traditional micro-Doppler extraction method

the full-polarization echo model of micro-motion targets is built

and then a full polarization-based micro-Doppler extraction algorithm is proposed.Such algorithm takes the time-frequency image contrast as the objective function and improves the time-frequency image quality by seeking for the optimal polarization vectors.The simulation results show that the proposed method can obtain a higher image contrast than the traditional time-frequency method.Furthermore

the real data demonstrates that the image contrast obtained by the proposed method is 2.56

compared with 0.88 to 1.66 of the traditional method.All the experimental results confirm the effectiveness of the proposed method and its advantages over the traditional method.