Joint oversampling FDM demultiplexing and perfectly reconstructing SBC filter bank for two channels

Within modern satellite communication scenarios, different users demand different bandwidths. Hence, digital processors should allow for flexible processing of FDM-signals for meeting these requirements. In that scope, two mutually exclusive processor tasks are distinguished: i) mere demultiplexing of independent FDM-signals and ii) demultiplexing of wideband channel signals with subsequent perfect reconstruction. In this paper, we present a matrix description of the well-known FDMUX filter bank [1] for two channels based on directional filter cells with reduced computational burden. Furthermore, we extend the improved approach to a novel joint SBC-FDFMUX filter bank structure, which combines both demanded tasks without extra computation compared to [1].