System Throughput Gain by New Channel Allocation Scheme for Spectrum Suppressed Transmission in Multi-Channel Environments over a Satellite Transponder

Sumika OMATA  Motoi SHIRAI  Takatoshi SUGIYAMA  

IEICE TRANSACTIONS on Communications   Vol.E103-B    No.10    pp.1059-1068
Publication Date: 2020/10/01
Publicized: 2020/03/27
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2019CBP0003
Type of Manuscript: Special Section PAPER (Special Section on New Era of Satellite Communication/Broadcasting/Application Technologies)
spectrum suppressed transmission,  frequency utilization efficiency,  FEC,  LE,  channel allocation,  system throughput,  

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A spectrum suppressed transmission that increases the frequency utilization efficiency, defined as throughput/bandwidth, by suppressing the required bandwidth has been proposed. This is one of the most effective schemes to solve the exhaustion problem of frequency bandwidths. However, in spectrum suppressed transmission, its transmission quality potentially degrades due to the ISI making the bandwidth narrower than the Nyquist bandwidth. In this paper, in order to improve the transmission quality degradation, we propose the spectrum suppressed transmission applying both FEC (forward error correction) and LE (linear equalization). Moreover, we also propose a new channel allocation scheme for the spectrum suppressed transmission, in multi-channel environments over a satellite transponder. From our computer simulation results, we clarify that the proposed schemes are more effective at increasing the system throughput than the scheme without spectrum suppression.