To resolve the problem of motion estimation of high speed moving targets about the stepped-frequency Chirp Signal

a acceleration and velocity estimation method based on polynomial phase transform is proposed

with a negative-positive stepped-frequency Chirp Signal. This method can achieve the real-time acceleration and accurate velocity estimation;then a method to resolve velocity ambiguity based on the image contrast is also presented;in the end

simulation results prove the well anti-noise

efficient and real-time performance of proposed methods.