Abstract: An imaging algorithm based on the two-dimensional Fourier transform is proposed for target imaging in a new type of passive radar system which uses multiple non-cooperative external illuminators as transmitters. In this algorithm the target scattering function could be reconstructed from the echo data via coordinate conversion, two-dimensional interpolation and two-dimensional Fourier transform. We select two circumstances for computer simulation: 12 TV station signals are available when the target rotated 30 degrees and 10 TV station signals were available when the target rotated 11 degrees, respectively. Simulation results show the effectiveness of the proposed algorithm.

Key words: external illuminator, passive radar imaging, coordinate conversion, two-dimensional interpolation