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A time-division multiplexing (TDM) digital channel coding scheme for wireline multi-drop interfaces has been proposed. Shaping the TX spectrum to avoid channel frequency notches, the proposed digital TDM signaling reduces inter-symbol interference (ISI) and far-end crosstalk (FEXT) in multi-drop bus (MDB) interfaces. Thanks to a proper guard interval insertion, the transmitted signal exhibits reduced inter-channel interference (ICI) among time-domain sub-channels, as compared to the previously proposed digital spectrum shaping signaling. Applying the proposed coding scheme, the data rate (DR) can be 4 times higher than the first channel notch frequency, without employing decision-feedback equalizer (DFE), feed-forward equalizer (FFE) and continuous-time linear equalizer(CTLE). However, non-return to zero (NRZ) signaling necessitates DFE with at least 12 taps on the receiver (RX) side for receiving data at the same rate.
Tobias Kippenberg, Xinru Ji, Zheru Qiu, Yang Liu, Xi Chen
Romain Christophe Rémy Fleury, Farzad Zangeneh Nejad
Paolo Ienne, Andrea Guerrieri, Lana Josipovic, Axel Marmet