Correction of DVB-T2 signal cross-ambiguity function for passive radar

Abstract

This paper provides an overview of the Digital Video Broadcasting-Second Generation Terrestrial (DVB-T2) signal structure and using this signal in passive radar systems. The cross-ambiguity function (CAF) of the DVB-T2 signal is analyzed. The specific structure of the DVB-T2 signal is a reason of the unwanted deterministic peaks appearing in the CAF in addition to the desired reflected target echo. These undesired peaks produced by pilot carriers and guard intervals can mask the target echo and cause false alarms. A CAF correction method based on the modification pilot carriers and blanking guard intervals of the reference DVB-T2 signal is proposed. The total losses of the DVB-T2 signal power after correction is about 14% (-0.64dB).