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Signals parameters evaluation in passive radar with illuminators of opportunity by variational method

Keywords:

N.G. Parhomenko, A.A. Peretyatko, J.A. Reyzenkind, V.S. Onishchenko, V.N. Shevchenko


Passive bistatic radar is considered. It includes an illumination source and two antennas. The reference antenna receives a direct signal from an illumination source and the target antenna receives a mix of the signals scattered by mobile objects. The problem of amplitudes, delays and Doppler shifts estimation of scattered signals is formulated as a residual minimization problem of the overdetermined system of linear algebraic equations. The additional condition to unknown amplitudes provides sparsity of searched signals amplitudes in delay – Dopler shift coordinates. The variational method is used for the solution of this problem. The resulting algorithm is shown to be effective in typical simulated scenarios with a six moving craft. For practical algorithm realization it is necessary use the multicore computer and code parallelization.
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