Ambiguity function analysis of digital radio mondiale signals for hf passive bistatic radar

Presented is an ambiguity function analysis of Digital Radio Mondiale signals in the HF band to demonstrate their suitability for HF passive bistatic radar. The ambiguities and interference floor are studied for different integration times. It is shown that interference floors of -40 dB are achieved with a 5 s integration time and that the ambiguity function properties are virtually independent of broadcast content, resulting in a very useful illuminator of opportunity