Abstract:
In this paper we propose and evaluate distributed multiuser linear precoding techniques for the downlink of multicell MIMO OFDM systems. The precoder is designed in two p...Show MoreMetadata
Abstract:
In this paper we propose and evaluate distributed multiuser linear precoding techniques for the downlink of multicell MIMO OFDM systems. The precoder is designed in two phases: first the intercell interference is removed by applying a set of precoding vectors computed in a distributed manner at each BS; then the system is further optimized through power allocation. Three centralized power allocation algorithms with per-BS power constraint and different complexity tradeoffs are proposed: one optimal to minimize the average BER and two suboptimal. The performances of the proposed schemes are compared to the centralized multicell based approaches recently proposed, and evaluated considering typical pedestrian scenarios. Numerical results show that the proposed suboptimal schemes achieve a performance very close to the optimal. Also, it is shown that for the same degrees of freedom the performance is closed to the one of centralized precoding schemes but with much lower feedback load over the backhaul network.
Published in: 2011 IEEE Vehicular Technology Conference (VTC Fall)
Date of Conference: 05-08 September 2011
Date Added to IEEE Xplore: 01 December 2011
ISBN Information: