Precoding design and user selection for multibeam satellite channels
2015 (English)In: IEEE Workshop on Signal Processing Advances in Wireless Communications, SPAWC, IEEE conference proceedings, 2015, 420-424 p.Conference paper (Refereed)Text
Precoding for the downlink of a multibeam satellite system has been recently shown, under ideal conditions, to be promising technique towards employing aggressive frequency reuse gainfully. However, time varying phase uncertainties imposed by the components and the channel, combined with delayed feedback perturbs the channel state information at the transmitter (CSIT). In this paper, we consider a power constrained robust formulation of the downlink precoding problem to counter the phase uncertainties. In particular it considers imposing conditions on the average signal to interference plus noise ratio (SINR), to deal with imperfect CSIT. In addition to the robust formulation, the primacy of user selection is highlighted and a new approach exploiting the satellite system design is proposed. Performance of the derived robust precoder in conjunction with the proposed location based user selection is then evaluated and the gains are tabulated.
Place, publisher, year, edition, pages
IEEE conference proceedings, 2015. 420-424 p.
Downlink, Feeds, Interference, Robustness, Satellites, Signal to noise ratio, Uncertainty, Channel state information, Communication satellites, Feedback, Feeding, Robustness (control systems), Signal interference, Signal processing, Spurious signal noise, Wave interference, Wireless telecommunication systems, Channel state information at the transmitters, Multi-beam satellite systems, Phase uncertainties, Robust formulations, Satellite system design, Signal to interference plus noise ratio
IdentifiersURN: urn:nbn:se:kth:diva-181184DOI: 10.1109/SPAWC.2015.7227072ISI: 000380547100085ScopusID: 2-s2.0-84953391841ISBN: 9781479919307OAI: oai:DiVA.org:kth-181184DiVA: diva2:901636
16th IEEE International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2015, 28 June 2015 through 1 July 2015
QC 201602082016-02-082016-01-292016-09-05Bibliographically approved