Joint sidelobe suppression method and device based on bipolar coding and windowing

The invention discloses a joint sidelobe suppression method and a joint sidelobe suppression device based on bipolar coding and windowing. Baseband data generated by a digital information source module are coded by a channel of a channel coding module; after being subjected to serial-to-parallel conversion of a modulation mapping and serial-to-parallel conversion module of a modulation mapping module, the baseband data are sent into a bipolar coding module; the bipolar coding module carries out bipolar coding on parallel data in sequence and then sends the parallel data into an IFFT transformation module for IFFT transformation; the data subjected to the IFFT transformation are sent into a parallel-to-serial conversion module for parallel-to-serial conversion after passing through a raised cosine window of a windowing module and are then sent into a radio frequency module to form a final OFDM modulation signal. According to the method, the sidelobe suppression performance can be improved under the conditions that the calculation complexity is not increased and interference is not introduced, so that the interference of a cognitive user on a main user is suppressed to the maximum extent.