Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/74289
Type: Artigo de periódico
Title: SINR Bounds for Broadcast Channels with Zero-Forcing Beamforming and Limited Feedback
Author: Fernandes, FG
Lopes, RD
Zanatta, D
Abstract: Channel state information at the transmitter (CSIT) enables high rates in multiuser systems with multiple transmit antennas, as it can be used for multiplexing gain and multiuser diversity. However, CSIT is often obtained through information fedback from the users, and it can be severely quantized to limit overhead. In this case, transmitting to multiple users will typically cause interference among them, which degrades the signal-to-interference-plus-noise ratio (SINR). In this letter, we derive bounds on this SINR, assuming that the transmitter uses zero-forcing beamforming, and that active users are almost orthogonal to one another. Simulation results show that our bounds may be used as a metric for user scheduling.
Subject: Broadcast channels
array signal processing
feedback communication
cochannel interference
diversity methods
Country: EUA
Editor: Ieee-inst Electrical Electronics Engineers Inc
Rights: fechado
Identifier DOI: 10.1109/TCOMM.2012.060112.100205A
Date Issue: 2012
Appears in Collections:Unicamp - Artigos e Outros Documentos

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