Adaptive Beamforming Passive Radar Based on FM Radio Transmitter

Target detection by non-cooperative illuminator is a study hotspot in electronic warfare field, with ´four countering´ potential advantages for passive radar. First of all, direct path interference (DPI) suppression which is the technique bottleneck of moving target detection by non-cooperative FM radio transmitter is analyzed in this paper. Secondly, a space-time-frequency domain synthetic solution to this problem is introduced: adaptive nulling array processing is employed in space domain; DPI cancellation based on adaptive fractional delay interpolation (AFDI) technique is used in time domain; additionally, coherent integration is utilized. Finally, an experimental system is schemed by regarding FM radio transmitter as non-cooperative illuminator, simulation results by real collected data show applying this method is effective in moving target detection