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access icon free Two-dimensional location of moving targets within local areas using WiFi-based multistatic passive radar

© The Institution of Engineering and Technology
Received 14/06/2013, Accepted 23/10/2013, Revised 19/09/2013, Published 30/01/2014

In this study the authors investigate the two-dimensional target localisation capabilities of a passive radar system based on WiFi transmissions. It is well known that the most straightforward way to achieve the target position estimation in the horizontal plane with a passive radar exploits the measurements either of a single bistatic range plus a direction of arrival (DoA) or of two bistatic ranges collected by two separate receivers. However, for a practical application it is interesting to clearly define which one of the two approaches provides the passive radar target localisation with a higher accuracy and whether combining both multiple bistatic range plus DoA measurements provides a further advantage. A multistatic configuration is considered which allows to collect a set of range/Doppler/angle measurements for a given target. Different target localisation strategies are devised and compared, based on subsets of the available measurements with the aim of understanding the localisation accuracies achievable using the different combinations of measurements. Experimental results are shown based on a passive radar prototype developed and fielded at the DIET Department – Sapienza University of Rome. This will contribute to demonstrate the fruitful application of the passive radar concept for short range surveillance.

Inspec keywords: search radar; wireless LAN; angular measurement; passive radar; Doppler radar; direction-of-arrival estimation

Other keywords: DoA measurement; passive radar target localisation; horizontal plane; Sapienza University of Rome; multiple-bistatic range; two-dimensional location; short-range surveillance; WiFi-based multistatic passive radar; target position estimation; moving targets; DIET Department; two-dimensional target localisation capability; Wi-Fi transmissions; separate receivers; direction-of-arrival estimation; range-Doppler-angle measurement

Subjects: Radar equipment, systems and applications; Signal processing and detection; Radio links and equipment; Spatial variables measurement

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