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Modeling the flow-level performance of hierarchical modulation in OFDMA-based networks

Abstract : Hierarchical Modulation (HM) is a means to enhance the spectral efficiency of a system by superposing, in terms of modulation, an additional stream for a given user with good radio conditions on a basic stream of a user with worse radio conditions. This, in turn, increases the throughput of the former user and hence the overall performance of the whole system. We consider, in this work, such a performance at the flow level, for a realistic dynamic setting where users come to the system and leave it after a finite duration corresponding, for instance, to the completion of a file transfer. We specifically model and quantify, both analytically and via simulations, the gain thus achieved and propose two extensions to the basic HM algorithm: a first one in which a user with bad radio conditions is also superposed on one with better radio conditions and a second one in which a user of one type is further superposed on a user of the same type as well.
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Contributor : Médiathèque Télécom Sudparis & Institut Mines-Télécom Business School <>
Submitted on : Monday, December 17, 2012 - 4:36:43 PM
Last modification on : Friday, September 25, 2020 - 11:07:32 AM

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Anis Jdidi, Tijani Chahed, Salah Eddine Elayoubi, Hichem Besbes. Modeling the flow-level performance of hierarchical modulation in OFDMA-based networks. Telecommunication Systems, Springer Verlag (Germany), 2012, 50 (3), pp.169-180. ⟨10.1007/s11235-010-9398-8⟩. ⟨hal-00766135⟩



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