This paper investigates the possibility to improve target detection capability in a DVB-Tbased\npassive radar sensor by jointly exploiting multiple digital television channels broadcast by the\nsame transmitter of opportunity. Based on the remarkable results obtained by such a multi-frequency\napproach using other signals of opportunity (i.e., FM radio broadcast transmissions), we propose\nappropriate modifications to the previously devised signal processing techniques for them to be\neffective in the newly considered scenarios. The resulting processing schemes are extensively applied\nagainst experimental DVB-T-based passive radar data pertaining to different surveillance applications.\nThe obtained results clearly show the effectiveness of the proposed multi-frequency approaches and\ndemonstrate their suitability for application in the considered scenarios.
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