On the Asymptotic Sum Rate of Downlink Cellular Systems With Random User Locations

Author

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

Author_Institution

KTH R. Inst. of Technol., Stockholm, Sweden

Volume

4

Issue

3

fYear

2015

fDate

6/1/2015 12:00:00 AM

Firstpage

333

Lastpage

336

Abstract

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.

Keywords

antenna arrays; approximation theory; cellular radio; interference; matrix algebra; optimisation; precoding; asymptotic sum rate; deterministic approximation; downlink cellular communication system; efficient optimization; ergodic sum rate; finite-sized systems; inter-user interference; multi-antenna base station; precoder matrix; random matrix theory; random user locations; regularized zero forcing precoder; Authentication; Availability; Data privacy; Encryption; Indexes; Protocols; Cellular networks; broadcast channel; downlink; linear precoding; random matrix theory;

fLanguage

English

Journal_Title

Wireless Communications Letters, IEEE

Publisher

ieee

ISSN

2162-2337

Type

jour

DOI

10.1109/LWC.2015.2415796

Filename

7065231