Deceptive Jamming Suppression by Frequency‐Domain Adaptive Processing With Multi‐Carrier Radar

ABSTRACT

This paper proposes a frequency‐domain adaptive processing method based on multi‐carrier radar to suppress deceptive jamming. Different from frequency diverse array‐multiple‐input multiple‐output (FDA‐MIMO) radars relying on spatial antenna arrays, the multi‐carrier radar obtains range‐dimension degrees of freedom through a single co‐located transceiver antenna by exploiting the frequency diversity of its multi‐carrier waveform, inherently decoupling range and angle processing dimensions. Leveraging the difference in steering vectors of true and false targets in the frequency domain, a frequency‐domain minimum variance distortionless response (MVDR) adaptive filter is employed to achieve effective suppression of deceptive jamming. Moreover, a spatial smoothing combined with a principal component analysis (PCA) method is adopted to accurately estimate the deceptive jamming covariance matrix in frequency‐domain adaptive processing. Simulation results demonstrate the effectiveness and robustness of the proposed method in deceptive jamming suppression.