Using FRFT to estimate target radial acceleration

Radial acceleration of radar target is characteristic of relative motion between radar and target, and is significant for maneuvering target recognition and tracking. To estimate radial acceleration from radar echo, fractional Fourier transformation (FRFT) was used in this paper. The acceleration estimation formula was deduced firstly, and then its estimation flow was given out. Differences in antinoise interference capability between FRFT, WVD-HT (Wigner-Ville distribution and Hough transformation) and WVD (Wigner-Ville distribution) in estimating chirp signal parameters were analyzed. Then the relation between acceleration measurement accuracy and angle search step was deduced, and lastly simulations were made, proving that the method can improve operational speed, control operational precision and be also of better antinoise interference capability than other methods.