Abstract
This paper investigates the possibility to improve target detection capability in a DVB-T- based passive radar sensor by jointly exploiting multiple digital television channels broadcast by the same transmitter of opportunity. Based on the remarkable results obtained by such a multi-frequency approach using other signals of opportunity (i.e., FM radio broadcast transmissions), we propose appropriate modifications to the previously devised signal processing techniques for them to be effective in the newly considered scenarios. The resulting processing schemes are extensively applied against experimental DVB-T-based passive radar data pertaining to different surveillance applications. The obtained results clearly show the effectiveness of the proposed multi-frequency approaches and demonstrate their suitability for application in the considered scenarios.
Highlights
Passive radar (PR) sensors exploit existing transmitters as illuminators of opportunity to perform target detection, localization, and possibly imaging [1,2]
We compare the detection performance provided by a single frequency (SF) operation and the proposed MF integration strategies against experimental data collected by a Digital Video Broadcasting-Terrestrial (DVB-T)-based PR in proposed MF integration strategies against experimental data collected by a DVB-T-based PR in an an aerial surveillance scenario
The benefits resulting from the application of MF approaches for maritime surveillance are investigated with reference to an acquisition campaign that was carried out in a site located on a small
Summary
Passive radar (PR) sensors exploit existing transmitters as illuminators of opportunity to perform target detection, localization, and possibly imaging [1,2]. Compared to the ATC application, the expected radar coverage benefits from the longer integration times allowed by vessels and from the vertical pattern of the transmitting antennas This implies the possibility of employing DVB-T-based PR sensors for monitoring typical maritime traffic as well as for detecting small boats close to the coast [16,17,18]. A comparative analysis is first carried on by meansagainst of simulations, with reference to accounting a purpose the conceived approaches are extensively validated experimental data of specific case studies; the reported results give some insights into the properties of the proposed for aerial set and maritime surveillance applications. Aerial surveillance application are illustrated, together with an extensive analysis of the is dedicated to an in-depth discussion of the outcomes obtained in experimental tests performed in detection performance improvement provided by the MF schemes compared to the SF approaches.
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