Acceleration Estimation Based on Wigner-Hough Transformation and Mid-Value Filter
Xianglong Zhang · Radar Science and Technology · 2012
When the number of radar transmitting pulses is few and the noise variance is big,the big error of acceleration estimation is obtained only based on WHT.Aiming at this problem,the method of acceleration estimation is proposed based on Wigner-Hough transformation(WHT) and mid-value filter in coherent pulse train.The characteristic of WVD in radar coherent pulse echo is analyzed and the relation between peak position and instantaneous frequency is discussed.Then the rate of frequency modulation is estimated based on Hough transformation and mid-value filter.At last,the acceleration is obtained according to the formula of acceleration estimation.The feasibility of this method is proved with different pulse numbers and signal to noise ratios(SNR).