Passive Radar Based on FM Radio Transmitter

摘要

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.