In the paper, the results of thesimulation research of radar target recognition using HRRP in condition of unknown noise where the signal-to-noise ratio (SNR) of training HRRPsand test HRRPs are differentpresented. Athreshold noise redution method and a recognition model are proposed in the paper to improve the recognition performance in condition of unknown noise. | Garadar target recognition using HRRP in condition of unknown noise