On the asymptotic sum rate of downlink cellular systems with random user locations

Maksym A. Girnyk, Axel Muller, Mikko Vehkaperä, Lars K. Rasmussen, Merouane Debbah

Research output: Contribution to journalArticle


We consider a downlink cellular communication system with a multi-antenna base station (BS). A regularized zero forcing precoder is employed at the BS to manage the inter-user interference within the cell. Using methods from random matrix theory, we derive a deterministic approximation for the achievable ergodic sum rate, taking into account the randomness from both fading and random user locations. The obtained approximation describes well the behavior of finite-sized systems and enables efficient optimization of the precoder matrix.
Original languageEnglish
Article number7065231
Pages (from-to)333-336
JournalIEEE Wireless Communications Letters
Issue number3
Publication statusPublished - 1 Jun 2015
MoE publication typeA1 Journal article-refereed


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