Automatic recognition of multiple LPI radar waveform

Abstract

Modern radar systems adopt low probability of intercept (LPI) radar to take advantage of low peak power and high duty cycle waveforms that make non-cooperative detection by electronic monitoring difficult. Accordingly, in the electronic warfare, detecting and recognizing the LPI radar signal is an important technology for protecting the equipment of a friend and promptly responding to the enemy. However, although the technique of recognizing the continuous wave LPI radar is indispensable, many studies have not been conducted yet. In this paper, we propose a LPI radar recognition technique based on a single shot multi-box detector (SDD), K-means clustering and a supplementary classifier to recognize the LPI radar signal when multiple LPI radar signals are received at the same time. The proposed LPI radar recognition technique classifies the case of receiving 2 or less signals of 12 continuous LPI radar signals (BPSK, Costas, LFM, Frank, P1, P2, P3, P4, T1, T2, T3, T4) considered in the literature. The proposed technique shows for the first time the possibility of recognizing multi LPI radar signals at on time.