Range-Angle Dependent Beampattern Synthesis Method for OFDM-Based Passive Radar

Frequency diverse array (FDA) radar applies a tiny frequency offset across its adjacent transmitting elements to generate range-angle-dependent beampattern. The increased degrees-of-freedom (DOFs) in range domain can help improve the performance of target detection, localization, and clutter suppression. Passive utilizes uncontrollable external signal as illuminator, which makes it difficult apply traditional process method. However, third-party illuminator such Orthogonal Division Multiplexing (OFDM) usually consists several closely spaced modulated carriers, has been widely selected for passive recent years. Considering orthogonality between even separated subcarriers, we propose new method by extracting processing each subcarrier received data independently attempt provide range-angle dependent beampattern OFDM radar. Numerical results real analyses verify superiority diversity on