Optimal fronthaul capacity allocation and training for joint uplink receiver in C-RAN

Konferenz: European Wireless 2016 - 22th European Wireless Conference
18.05.2016 - 20.05.2016 in Oulu, Finnland

Tagungsband: European Wireless 2016

Seiten: 6Sprache: EnglischTyp: PDF

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Autoren:
Boviz, Dora (Nokia Bell Labs & CentraleSupelec, Laboratoire des Signaux et Systemes, 3 rue Joliot-Curie, 91190 Gif-sur-Yvette, France)
Yang, Sheng (CentraleSupelec, Laboratoire des Signaux et Systemes, 3 rue Joliot-Curie, 91190 Gif-sur-Yvette, France)

Inhalt:
In Cloud Radio Access Networks (C-RAN) one of the main challenges is accurate data transfer on limited capacity fronthaul links between Remote Radio Heads (RRHs) and the central processing unit. Particularly in large-band and multi-antenna transmissions, fronthaul capacity can be a limiting factor. In this paper we study the impact of non-ideal fronthaul on uplink received signal, channel estimates and consequently on the achievable rates. We consider both the fronthaul capacity and the length of training sequences variable and find optimal values allowing high-rate transmission taking into account the costs of over-the-air transmission and fronthaul usage, thus, our approach can be used in dynamic system design and configuration given technical and economical factors.