  This study investigates the jamming attack on the orthogonal
frequency-division multiplexing (OFDM) based physical channels in 5G new radio
(NR) technology from the aspect of signal processing. Disrupting the
orthogonality property between subcarriers (SCs) is considered as one of the
jammers targets in OFDM based generations. Focusing on the orthogonality
property, we propose a method to detect the attacked subcarriers, and then
neutralize the jamming attack using a multiplicative signal. Thanks to studying
the frequency aspect of the attacked signal, the proposed method is independent
of the jammers transmitted power. Simulation results evaluate the detection
performance of the proposed method with various numbers of OFDM subcarriers.
