Capacity-Based Uplink Scheduling Using Long-Term Channel Knowledge
Bandemer, B.
Visuri, S.
Nokia Res. Center, Espoo;
This paper appears in: Communications, 2007. ICC '07. IEEE International Conference on
Publication Date: 24-28 June 2007
On page(s): 785-790
Location: Glasgow,
ISBN: 1-4244-0353-7
INSPEC Accession Number: 9874826
Digital Object Identifier: 10.1109/ICC.2007.134
Current Version Published: 2007-08-13
Abstract
In the multi-user MIMO uplink channel, the presence of multiple receive antennas enables the base station to serve a number of users simultaneously, thus increasing overall system throughput. In practice, users have to be scheduled instead of being served all at once. In this work, a novel scheduling metric is proposed based on ergodic sum capacity. A low-SNR Taylor series of the capacity expression is combined with a receiver-correlation channel model to obtain a robust measure of spatial compatibility. Long-term channel knowledge at the base station is sufficient for metric evaluation, which significantly reduces the amount of required channel sounding, compared to previously proposed schemes.
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