Combined interference cancellation with FEC decoding for high spectral efficiency satellite communications

摘要

A combined interference cancellation communication system employing forward error code (FEC) decoding for high spectral efficiency satellite communications. The disclosed system enables efficient utilization of available bandwidth through overlapping adjacent channels. A receiver is used to receive a waveform having data information and noise information. A filter bank is coupled with the receiver to receive and filter waveform and output channel information received by the receiver. The channel information received includes a combination of data signals and adjacent channel interference signals. Soft-input and soft-output decoders are provided to receive the channel information in order to calculate an estimated interference value. Additionally, the soft-input and soft-output interference canceler is provided for receiving the output channel information and the estimated interference value calculated from the decoders in order to provide a relatively more accurate estimated data signal. Typically, such systems employ remote ground terminals, e.g., VSAT, which are used for communicating via a geosynchronous satellite from a remote location to a central hub station or other remote locations. A particular advantage of the disclosed systems is their relatively low site cost and small earth station size.