Multiple-address signal processing method of wideband satellite communication link in next-generation communication system

The invention relates to a multiple-address signal processing method of a wideband satellite communication link in a next-generation communication system, belonging to the technical field of satellite communication and mobile communication and solving the problems that a future broadband multimedia satellite system has no optimal on-board processing method of multiple-address access system yet at present. The invention comprises two multiple-address signal processing methods of the wideband satellite communication link in the next-generation communication system; one method adopts an OFDMA mode and is characterized in that fast Fourier transform is adopted to simply realize high-speed transmission processing, a circulating prefix is used so as to have stronger robustness to multi-path channel loss and intersymbol interference, and a receiving terminal is provided with a structure with channel estimate and balance functions; and the other method adopts an SC-FDMA mode and is characterized in that a discrete Fourier transform extended module is added after a serial-parallel module so as to sequentially enter a fast Fourier transform module and lower a PAPR value. The invention has the advantages of simple method, reasonable design, reliable performance and greater popularization value.