The invention discloses a 
radar range profile statistics and recognition method based on a PPCA model in the strong 
noise background, which relates to the technical field of 
radar automatic target recognition and mainly solves the problem that the current statistics and recognition methods based on the PPCA model are not robust to noises. The 
training phase comprises the following steps: framing, translating, aligning and strength-normalizing 
radar HPPR continuously, learning the parameters of each 
azimuth frame of the PPCA model by adopting the processed HRRP and storing a template. The 
test phase comprises the following steps: first strength-normalizing, translating and aligning the samples to be tested and then estimating the range of the 
signal-to-
noise ratios (SNR) of the samples; computing the distance value of each frame of each target and deciding the 
category attribute if the SNR is more than 30dB, and 
rewriting the distance value, solving the 
noise energy under SNR condition by minimizing the distance value, finally computing the distance value of each frame of each target and deciding the 
category attribute if the SNR is less than 30dB. The method has the advantages of robustness to noises and less computation and is applied to identifying radar targets.