Abstract:

For the frequency diverse array (FDA) to suppress the interference near the target position outside the platform, the combination of traditional FDA and nonlinear frequency offset cannot achieve range-angle decoupling, logarithmic increasing FDA main lobe broadening and Hamming window weighted FDA range dimension sidelobe too high. Based on the full study of the Hamming window weighted linear FDA (HL-FDA) scheme, the performance of four frequency offset schemes is analyzed, and the frequency diverse array multiple-input multiplt-output structure is proposed to replace the traditional one-dimensional uniform linear FDA structure. By combining the minimum variance distortion free response (MVDR) criterion, the HL-FDA is applied to the MVDR adaptive beamforming level to suppress the platform external interference. The simulation results show that the HL-FDA can effectively counter the range-angle two-dimensional platform external interference combined with the MVDR adaptive beamforming algorithm.

Key words: frequency diverse array (FDA), range-angle coupling, nonlinear frequency offset, minimum variance distortion free response (MVDR), interference suppression