Power Allocation for Two-Cell Two-User Joint Transmission
Journal article, 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)

Author

Jingya Li

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Thomas Eriksson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Tommy Svensson

Chalmers, Signals and Systems, Communication and Antenna Systems, Communication Systems

Carmen Botella Mascarell

Universitat de Valencia

IEEE Communications Letters

1089-7798 (ISSN)

Vol. 16 19 1474-1477 6249704

Advanced Radio Interface Technologies for 4G Systems (ARTIST4G)

European Commission (FP7), 2010-01-01 -- 2012-06-30.

Areas of Advance

Information and Communication Technology

Subject Categories

Communication Systems

Signal Processing

DOI

10.1109/LCOMM.2012.072012.121096

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Latest update

3/6/2018 1