| This thesis firstly introduces some basic signal processing methods of external illuminator radar based on signal processing flow in mono-static passive radar, which comprise target detecting interrelated arithmetics, track processing, the fundamental of direction find technique and location method of T-R double-static passive radar system. Then, a network of PCs quasi-real time processing system based on Matlab software platform is proposed. Depending on this system, direction find arithmetics in external illuminator radar are verified by real data through outfield experiments. Finally, two direction find arithmetics in external illuminator radar are deduced and the analysis of real data processing are presented respectively. The first one is a direction find technique based on adcock antenna, which measures angle by comparing phasic mainly utilizing the phasic relations of four-elenment circular array; Another is a direction find technique based on horizontal polarized circular array antenna, which measures angle by comparing amplitude mainly utilizing the different directions of circular array antenna major lobe. |
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