JOINT OVERSAMPLING FDM DEMULTIPLEXING AND PERFECTLY RECONSTRUCTING SBC FILTER BANK FOR TWO CHANNELS1

Within modern satellite communication scenarios, different users demand different bandwidths. Hence, digital processors should al-low for flexible processing of FDM-signals for meeting these re-quirements. 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 ma-trix description of the well-known FDMUX filter bank [1] for two channels based on directional filter cells with reduced computa-tional 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]. 1