There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.
China Digital Radio (CDR) broadcasting is a new standard of digital audio broadcasting
of FM frequency (87–108 MHz) based on our research and development efforts. It is
compatible with the frequency spectrum in analog FM radio and satisfies the requirements
for smooth transition from analog to digital signal in FM broadcasting in China. This
paper focuses on the signal characteristics and processing methods of radio-based
passive radar. The signal characteristics and ambiguity function of a passive radar
illumination source are analyzed. The adverse effects on the target detection of the
side peaks owing to cyclic prefix, the Doppler ambiguity strips because of signal
synchronization, and the range of side peaks resulting from the signal discontinuous
spectrum are then studied. Finally, methods for suppressing these side peaks are proposed
and their effectiveness is verified by simulations.