Resource allocation for OFDMA systems with multi-cell joint transmission
Paper i proceeding, 2012

This paper considers the downlink resource allocation of a coordinated multi-cell cluster in OFDMA systems with universal frequency reuse. Multi-cell joint transmission is considered via zero-forcing precoding. Furthermore, joint optimization of the user selection and power allocation across multiple subchannels and multiple cells is studied. The objective is to maximize the weighted sum rate under per-base-station power constraints. Based on general duality theory, two iterative resource allocation algorithms are proposed and compared with the optimal solution, which requires an exhaustive search of all possible combinations of users over all subchannels. Simulation results show that the two proposed algorithms achieve a performance very close to the optimal, with much lower computational complexity. In addition, we show that joint user set selection across multiple subchannels significantly improves the system performance in terms of the weighted sum rate.

OFDMA

base-station coordination

power control

scheduling

multi-cell joint transmission

Författare

Jingya Li

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Xin Chen

Beijing University of Posts and Telecommunications

Carmen Botella Mascarell

Universitat de ValEncia

Tommy Svensson

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Thomas Eriksson

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

2012 IEEE 13th International Workshop on Signal Processing Advances in Wireless Communications, SPAWC 2012. Cesme, 17-20 June 2012

179-183 6292883

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Signalbehandling

DOI

10.1109/SPAWC.2012.6292883

ISBN

978-1-4673-0971-4