King's College London

Research portal

Energy Efficient Multicast Precoding for Multiuser Multibeam Satellite Communications

Research output: Contribution to journalArticle

Chenhao Qi, Huajian Chen, Yansha Deng, Arumugam Nallanathan

Original languageEnglish
Article number8944289
Pages (from-to)567-570
Number of pages4
JournalIEEE Wireless Communications Letters
Volume9
Issue number4
DOIs
Publication statusPublished - Apr 2020

King's Authors

Abstract

Aiming at maximizing the energy efficiency (EE) of multicast multibeam satellite communications, we consider the precoding design under the total power and quality of service (QoS) constraints. Since the original EE maximization problem is nonconvex, it is sequentially converted into a concave-convex fractional programming problem by introducing some variables and using the first-order Taylor low bound approximation. Based on the Charnes-Cooper transformation, it is further converted into a convex problem. Then an iterative algorithm is presented to design the energy efficient precoding. To find feasible initialization points for the algorithm and ensure its convergence, another convex optimization problem with some nonnegative slack variables and a positive penalty parameter is iteratively solved. In particular, the algorithm is verified by the measured channel data of multibeam satellite communications.

View graph of relations

© 2018 King's College London | Strand | London WC2R 2LS | England | United Kingdom | Tel +44 (0)20 7836 5454