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    Item type:Publication, Access status: without files ,
    Faster-than-Nyquist signaling for satellite communications: A PAPR analysis
    (2017-02)
    Delamotte, Thomas
    ;
    Knopp, Andreas
    ;
    Bauch, Gerhard
    Faster-than-Nyquist signaling is a linear modulation strategy whose interest has significantly raised in the last years especially in the context of satellite communications. In this paper, we are interested in the peak-to-average power ratio (PAPR) behavior of such signals in comparison to usual signals generated with Nyquist signaling. To this end, a statistical analysis of the instantaneous power distribution is performed when a square-root raised cosine filter is used for pulse shaping. We especially show that, for small values of the pulse shaping filter roll-off factor, faster-than-Nyquist signaling can offer better PAPR behavior than Nyquist signaling if the transmit symbol constellation and the symbol rate are appropriately chosen.
    Publicationtype: Conference Paper
      40
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    Pulse shaping for satellite systems with time packing: An eigenfilter design
    (2015)
    Delamotte, Thomas
    ;
    Bauch, Gerhard
    Spectrum efficiency is becoming a major issue in satellite communications due to the dramatically increasing data rates requirements and the competition with terrestrial networks. The time packing strategy, by allowing to optimally exploit the available bandwidth without resorting to higher-order constellations, is a promising solution that has gained interest in the last years. The provided spectral efficiency improvement is obtained by accepting intersymbol interference (ISI) and the use of Nyquist pulse shaping filters is not required anymore for such systems. New filters, better complying with other design constraints can thus be considered. In this work, an eigenfilter design is proposed for the pulse shaping filters used in satellite systems with time packing. This design especially aim at limiting the envelope fluctuations of the transmit signals to offer better robustness against the distortions induced by highly nonlinear power amplifiers.
    Publicationtype: Conference Paper
      60
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    Item type:Publication, Access status: without files ,
    Receiver design for geo satellite systems using MIMO and time-frequency packing
    (IEEE, 2014-08)
    Delamotte, Thomas
    ;
    Bauch, Gerhard
    Spectrum efficiency is becoming a major issue in satellite communications due to the dramatically increasing data rates requirements and the competition with terrestrial networks. MIMO and time-frequency packing, by respectively exploiting space and frequency degrees of freedom, offer new perspectives and pave the way for even more spectral efficient communications. In this paper, receive strategies for MIMO geostationary satellite systems using time-frequency packing are designed and their performance is compared to state-of-the-art SISO strategies.
    Publicationtype: Conference Paper
      110