A Method to Suppress the Noise Convolution Jamming in FDA-MIMO Radar

Smart noise convolution jamming based on digital radio frequency memory (DRFM) has both oppressive jamming effect and deceptive jamming effect, which is difficult to be effectively suppressed by traditional anti-jamming methods and is a serious effect on the performance of modern radar systems. In this paper, a noise convolution jamming suppression method for multiple-input-mutiple-output (MIMO) radar with frequency diverse array (FDA) is proposed. The jamming signal is modulated by the jammer and emitted across the pulse repetition period (PRT), and is different from the target echo in the transmit spatial frequency and the Doppler frequency. On this basis, jamming samples are selected based on the range-dependent transmit steering vector of the FDA-MIMO radar firstly. The filter is subsequently designed in the transmitting spatial frequency domain, and the jamming is suppressed due to the range mismatch. Simulation results demonstrate the effectiveness of the proposed approach.