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Channel Prediction and Feedback in Multiuser Broadcast Channels

Summary: Channel Prediction and Feedback
in Multiuser Broadcast Channels
Adam J. Tenenbaum and Raviraj S. Adve
Dept. of Electrical and Computer Engineering
University of Toronto
10 King's College Road, Toronto, ON, M5S 3G4, Canada
Email: {adam,rsadve}@comm.utoronto.ca
Young-Soo Yuk
Mobile Communication Research Lab
LG Electronics, Inc.
533, Hogye-1dong, Dongan-gu, Anyang-shi, 431-749, Korea
Email: sixs@lge.com
Abstract--Multiuser linear precoding requires channel state
information (CSI) at the transmitter. In the absence of channel
reciprocity between the uplink and downlink, a feedback mech-
anism must be designed to communicate CSI estimates from the
mobile receivers to the transmitter. Limiting the total feedback
rate is an important design goal for multiuser multiple-input,
multiple-output systems, as the feedback overhead can potentially
consume a large percentage of system resources, especially when


Source: Adve, Raviraj - Department of Electrical and Computer Engineering, University of Toronto


Collections: Engineering