Factors and Trade-offs in Bandwidth Efficient Modulation and Coding Schemes Design

Ifiok Otung

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review


This paper explores the factors and trade-offs involved in the design of bandwidth efficient modulation and coding schemes for application in high data rate digital transmission systems such as a satellite communication downlink operating under constraints of limited bandwidth and power. The interplay of symbol correlation, carrier-to-noise ratio, available bandwidth, filter roll-off factor and forward error correction in meeting desired transmission quality target is presented. Some of the ideas developed are then applied to develop new 16APSK and 32APSK modulation constellations. It is shown that, compared with the well-known DVB-S2 constellations, the new arrangements produce lower bit error rates and hence some saving in signal power when operated in additive white Gaussian noise (AWGN) channels. Although not yet tested, it is expected that the observed advantage of the new constellations will be maintained in the presence of amplifier-induced non-linearity in satellite transmission channels since the new constellations are constructed on the same number of amplitude rings as in the DVB-S2 schemes.
Original languageEnglish
Title of host publication35th AIAA International Communications Satellite Systems Conference, Trieste, Italy
PublisherAerospace Research Central
Number of pages16
ISBN (Electronic)978-1-62410-518-0
Publication statusPublished - Oct 2017
Event35th AIAA International Communications Satellite Systems Conference: Commercial Space Applications: Transformation, Fusion and Competition - Trieste, Italy
Duration: 16 Oct 201719 Oct 2017


Conference35th AIAA International Communications Satellite Systems Conference
Abbreviated titleICSSC 2017


  • Satellite communication systems
  • Modulation
  • coding theory
  • Digital Video Broadcasting
  • DVB-S2 Constellation


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