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Performance Evaluation of Coordinated Multi-Point Transmission Schemes with Predicted CSI

Jingya Li (Institutionen för signaler och system, Kommunikationssystem) ; Agisilaos Papadogiannis (Institutionen för signaler och system, Kommunikationssystem) ; Rikke Apelfröjd ; Tommy Svensson (Institutionen för signaler och system, Kommunikationssystem) ; Mikael Sternad
The 23rd IEEE International symposium on Personal, Indoor and Mobile Radio Communications, PIMRC'2012, Sydney 9-12 September 2012 (2166-9570). p. 1055-1060. (2012)
[Konferensbidrag, refereegranskat]

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.

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Denna post skapades 2012-06-11. Senast ändrad 2015-03-30.
CPL Pubid: 158786


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Denna publikation är ett resultat av följande projekt:

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