Techniques Of Passive Radar Imaging Based Motion Compensation Using Multiple TV Signals

The configuration and basic principle of passive radar imaging of non-cooperative target are investigated by using multiple TV station signals and one receiver at a certain location. An imaging algorithm taking motion compensation into account based on two-dimensional Fourier transform is proposed. In this algorithm, based on scatterers and turntable models, as the target moves, since there exists a best correlation between two adjacent echoes in shot time,this paper presents an motion compensation based passive radar imaging algorithm which uses the maximal value of the correlation function between two adjacent echoes to estimate the compensation factor. It can be deduced that this echo data is the sample of two-dimensional Fourier transform of the target scattering function. Taking some preprocessing like coordinate conversion, selecting a suitable interpolation area and two-dimensional interpolation, then the target image could be reconstructed through two-dimensional Fourier transform. The simulations are performed using 10 TV station signals when the target rotates 40 degrees. With the parameters such as the frequencies of the 10 TV station signals, the places of the 10 TV stations, the place of the receiver are specified and so on, analyzing the work range available of the system and the effect which the angles between TV stations and receiver work on system. Well-reconstructed target images, the simulation results show the effectiveness of the proposed algorithm.