Velocity precise measurement using combination of circular correlation based on HRRP

To solve the distortion of high resolution range profile (HRRP) due to target's motion for step frequency signal, a positive-negative-positive style step frequency waveform is designed which is separated into groups constituted of two positive pulse trains and one negative pulse train. A corresponding velocity precise measurement method using combination of circular correlation of HRRP is presented, and the final precise velocity estimated value is identified by combining coarse velocity estimated value and precise velocity estimated value. The simulation results indicate that this method can achieve a very high precision with little computation and has good anti-noise and anti-motility performance. This method is especially applicable to the system requiring high speed signal processing.