Open AccessMicro-Doppler Signature Based Helicopter Identification and Classification Through Machine Learning
Author(s) -
S. Iswariya,
J. Valarmathi
Publication year - 2021
Publication title -
international journal of computers
Language(s) - English
Resource type - Journals
ISSN - 1998-4308
DOI - 10.46300/9108.2021.15.4
Subject(s) - signature (topology) , helicopter rotor , rotor (electric) , short time fourier transform , identification (biology) , signal (programming language) , radar , computer science , pattern recognition (psychology) , artificial intelligence , cluster analysis , blade (archaeology) , doppler effect , fourier transform , acoustics , engineering , mathematics , aerospace engineering , physics , fourier analysis , structural engineering , mechanical engineering , mathematical analysis , botany , geometry , astronomy , biology , programming language
This paper focuses on identification of helicopter by exploiting the concept of micro-Doppler effect which is prominent in targets containing rotating, oscillating or vibrating parts in it. Radar received signal is analyzed by Short Time Fourier Transform (STFT) to extract the micro Doppler (mD) signature. From the mD signature, the helicopter parameters are estimated. In a multiple helicopters scenario, estimated parameters will be a mixure, pertaining to the multiple helicopters. These parameters are classified further using a machine learning algorithm, namely k-means clustering to classify the helicopters. Simulated results for the synthesized received signal shows the betted estimates of the helicopter parameter through mD signature. Dataset containing basic parameters like number of blades, blade length and rotational rates of the UN-1N helicopter (rotor with 2 blades), the SH-3H helicopter (rotor with 5 blades) and the CH-54B helicopter (rotor with 6 blades) are considered for the classification. Results show a good classification. When analysed with different SNR level in dataset, at lower SNR, observed some ovelapping in the classification.