Performance Evaluation of Coordinated Multi-Point Transmission Schemes with Predicted CSI
Paper i proceeding, 2012

Coordinated multi-point (CoMP) transmission is considered as an efficient technique to improve cell-edge performance as well as system spectrum efficiency. In CoMP-enabled systems, a cluster of coordinated base stations (BSs) are typically assumed to be connected to a control unit (CU) via backhaul links, and the provided performance gain heavily relies on the quality of the channel state information (CSI) available at the CU side. In this paper, we consider the downlink of a CoMP cluster and compare three different CoMP transmission schemes: zero-forcing coherent joint transmission, non-coherent joint transmission and coordinated scheduling. Moreover, for each of the analyzed schemes, the performance in terms of average sum rate of the CoMP cluster is studied with predicted CSI, considering the effects of the feedback and backhaul latency, as well as the user mobility. Compared to zero-forcing coherent joint transmission, we show that non-coherent joint transmission and coordinated scheduling are more robust to channel uncertainly. In addition, depending on the latency, user mobility and user locations, different schemes would achieve the highest average sum rate performance. Hence, a system could switch between the transmission schemes to improve the sum rate.

Författare

Jingya Li

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Agisilaos Papadogiannis

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

R. Apelfrojd

Uppsala Universitet

Tommy Svensson

Signaler och system, Kommunikationssystem, informationsteori och antenner, Kommunikationssystem

Mikael Sternad

Uppsala Universitet

IEEE International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC

1055-1060 6362501

Styrkeområden

Informations- och kommunikationsteknik

Ämneskategorier

Telekommunikation

Signalbehandling

DOI

10.1109/PIMRC.2012.6362501

ISBN

978-146732569-1