Power Allocation for Two-Cell Two-User Joint Transmission
Artikel i vetenskaplig tidskrift, 2012

In this paper, we develop a power allocation scheme for the downlink of a two-cell two-user joint transmission system. The objective is to maximize the sum rate under per-cell power constraints. We study a worst case scenario where the carrier phases between the two base stations are un-synchronized, so that joint transmission must be performed without precoding. The derived power allocation scheme is remarkably simple, i.e., each cell transmits with full power to only one user. Note that joint transmission is still possible, when two cells select the same user for data transmission. Moreover, we prove that, in this scenario, the joint transmission case happens with higher probability when the maximum transmit power is high, or the two users are in the overlapped cell-edge area.

joint transmission

Power allocation

imperfect synchronization

coordinated multi-point (CoMP)

Författare

Jingya Li

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Thomas Eriksson

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Tommy Svensson

Chalmers, Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Carmen Botella Mascarell

Universitat de Valencia

IEEE Communications Letters

1089-7798 (ISSN)

Vol. 16 1474-1477 6249704

Advanced Radio Interface Technologies for 4G Systems (ARTIST4G)

Europeiska kommissionen (FP7), 2010-01-01 -- 2012-06-30.

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Kommunikationssystem

Signalbehandling

DOI

10.1109/LCOMM.2012.072012.121096