On downlink beamforming with greedy user selection: performance analysis and a simple new algorithm
Top Cited Papers
- 19 September 2005
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Signal Processing
- Vol. 53 (10) , 3857-3868
- https://doi.org/10.1109/tsp.2005.855401
Abstract
This paper considers the problem of simultaneous multiuser downlink beamforming. The idea is to employ a transmit antenna array to create multiple "beams" directed toward the individual users, and the aim is to increase throughput, measured by sum capacity. In particular, we are interested in the practically important case of more users than transmit antennas, which requires user selection. Optimal solutions to this problem can be prohibitively complex for online implementation at the base station and entail so-called Dirty Paper (DP) precoding for known interference. Suboptimal solutions capitalize on multiuser (selection) diversity to achieve a significant fraction of sum capacity at lower complexity cost. We analyze the throughput performance in Rayleigh fading of a suboptimal greedy DP-based scheme proposed by Tu and Blum. We also propose another user-selection method of the same computational complexity based on simple zero-forcing beamforming. Our results indicate that the proposed method attains a significant fraction of sum capacity and throughput of Tu and Blum's scheme and, thus, offers an attractive alternative to DP-based schemes.Keywords
This publication has 16 references indexed in Scilit:
- Sum Capacity of Gaussian Vector Broadcast ChannelsIEEE Transactions on Information Theory, 2004
- Duality, achievable rates, and sum-rate capacity of gaussian mimo broadcast channelsIEEE Transactions on Information Theory, 2003
- Multiuser diversity for a dirty paper approachIEEE Communications Letters, 2003
- Sum capacity of the vector Gaussian broadcast channel and uplink–downlink dualityIEEE Transactions on Information Theory, 2003
- Downlink capacity evaluation of cellular networks with known-interference cancellationIEEE Journal on Selected Areas in Communications, 2003
- Multiple antenna transmitter optimization schemes for multiuser systemsPublished by Institute of Electrical and Electronics Engineers (IEEE) ,2003
- Capacity of Multi‐antenna Gaussian ChannelsEuropean Transactions on Telecommunications, 1999
- The impact of antenna diversity on the capacity of wireless communication systemsIEEE Transactions on Communications, 1994
- Trellis shapingIEEE Transactions on Information Theory, 1992
- Matrix AnalysisPublished by Cambridge University Press (CUP) ,1985