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Limited Feedback Multiuser Scheduling of Spatially Correlated Broadcast Channels | IEEE Journals & Magazine | IEEE Xplore

Limited Feedback Multiuser Scheduling of Spatially Correlated Broadcast Channels


Abstract:

This paper investigates the transmission scheduling of users under spatially correlated multiple-input-multiple-output (MIMO) channels. By maximizing an upper bound of th...Show More

Abstract:

This paper investigates the transmission scheduling of users under spatially correlated multiple-input-multiple-output (MIMO) channels. By maximizing an upper bound of the sum capacity, we propose a scheduling scheme that requires only scalar feedback from each receiving user. To simplify user information feedback and better exploit the spatial channel correlation, we further develop a more efficient scheduling method that only requires a 1-bit indicator from each user and selects users based on the MIMO channel correlation information. Additionally, we then extend the proposed scheduling schemes for the system with imperfect (finite-rate) channel information feedback. Numerical results finally show that the proposed scheduling schemes can effectively improve the system sum capacity performance by exploiting the statistic channel-correlation information.
Published in: IEEE Transactions on Vehicular Technology ( Volume: 58, Issue: 8, October 2009)
Page(s): 4406 - 4418
Date of Publication: 10 April 2009

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