Passive Radar Source Localization Based on PSAAA Using Single Small Size Aircraft

This paper considers the problem of how to accurately and passively localise the hostile radar position based on only one small size aircraft. Inspired by Synthetic Aperture Sonar (SAS), Synthetic Aperture Radar (SAR) and multi-static passive radar, a similar concept of Passive Synthetic Aperture Antenna Array (PSAAA) is introduced into this paper. The same single receiver carried by one small aircraft is virtually taken as PSAAA element at different flight track positions at multiple different moments. Taking full advantages of aircraft space movement and radar antenna circular rotation, it is proposed an effective method to estimate the Virtual Time Differences of Arrival (VTDOAs). The VTDOAs are the passive localization information defined as the time differences of the radar pulse transmission from the radar position to different virtual receivers. Based on the VTDOAs estimation, we propose a construction method for the binary quadratic localization equation group, and then a closed-form solution algorithm is given for passive radar position estimation. Simulations corroborate the performance of the proposed methods.

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