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Power Allocation for Two-Cell Two-User Joint Transmission

Jingya Li (Institutionen för signaler och system, Kommunikationssystem) ; Thomas Eriksson (Institutionen för signaler och system, Kommunikationssystem) ; Tommy Svensson (Institutionen för signaler och system, Kommunikationssystem) ; Carmen Botella
IEEE Communications Letters (1089-7798). Vol. 16 (2012), 19, p. 1474-1477.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Power allocation, joint transmission, coordinated multi-point (CoMP), imperfect synchronization

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Denna post skapades 2012-08-10. Senast ändrad 2016-02-01.
CPL Pubid: 161407


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Denna publikation är ett resultat av följande projekt:

Advanced Radio Interface Technologies for 4G Systems (ARTIST4G) (EC/FP7/247223)