A rate splitting strategy for mitigating intra-cell pilot contamination in massive mimo

The spectral efficiency (SE) of Massive MIMO (MaMIMO) systems is affected by low quality channel estimates. Rate-Splitting (RS) has recently gained some interest in multiuser multiple antenna systems as an effective means to mitigate the multi-user interference due to imperfect channel state information. This paper investigates the benefits of RS in the downlink of a single-cell MaMIMO system when all the users use the same pilot sequence for channel estimation. Novel expressions for the SE achieved in the downlink by a single-layer RS strategy (that relies on a single successive interference cancellation at each user side) are derived and used to design precoding schemes and power allocation strategies for common and private messages. Numerical results are used to show that the proposed RS solution achieves higher spectral efficiency that conventional MaMIMO with maximum ratio precoding

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RedactioneelAnn Bergmans en Chris De Maegd i.s.m. W.A. Olyslager en D. Vande Gaer De Sint-Jan-de-Doperkerk van het Groot Begijnhof in Leuven. [The Saint John-the-Baptists church in the Great Beguingage at Louvain.]- A. Fauconnier Het Goltfuss-orgel in de Begijnhofkerk in Leuven. [The organ by Goltfuss in the Beguinage church at Louvain.]- Lode De Clercq De restauratie van een monumentale sculptuurreeks in de Sint-Jan-de-Doperkerk in Leuven. [The restoration of a monumental series of sculptures in the Beguinage church Saint John-the-Baptist at Louvain.]- M. Buyle De polychromie van het noorderportaal van de Sint-Jan-de-Doperkerk in Leuven. [The polychromy of the northem portal of the Saint John-the-Baptists church at Louvain.]B. Bailleul, L. Heyvaert, D. Laporte en N. Poulain Een toren voor boeken 1935-1985, Henry van de Velde en de bouw van de Universiteitsbibliotheek en het Hoger Instituut voor Kunstgeschienis en Oudheidkunde in Gent. [A tower for books 1935-1985, Henry van de Velde and the construction of the University Library and the Higher Institute for Art History and Archaeology at Ghent.]M.M. Celis en W.J. Slock Op de valreep van teloorgang: het Georges Hobé-gebint in Tervuren na jaren aftakeling gerestaureerd en heropgericht. [The Hobé carcass at Tervuren restored and set up again after years of decay.]SummaryM&L Binnenkran

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