Common rate support in multi-antenna downlink channels using semi-orthogonal user selection

Taesang Yoo; Gerard J. Foschini; Reinaldo A. Valenzuela; Andrea J. Goldsmith

doi:10.1109/TIT.2011.2143810

Common rate support in multi-antenna downlink channels using semi-orthogonal user selection

Taesang Yoo, Gerard J. Foschini, Reinaldo A. Valenzuela, Andrea J. Goldsmith

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

We consider a flat fading multiantenna downlink system with a large number of users where the objective is to deliver equal rates to nonoutage users with a low complexity. We show that in the limit of a large number of users, a zero-forcing beamforming strategy combined with a low complexity user grouping algorithm based on a semi-orthogonal user selection achieves asymptotically optimal performance, with respect to an upper bound that can be achieved when no interference is present among users.

Original language	English (US)
Article number	5773070
Pages (from-to)	3449-3461
Number of pages	13
Journal	IEEE Transactions on Information Theory
Volume	57
Issue number	6
DOIs	https://doi.org/10.1109/TIT.2011.2143810
State	Published - Jun 2011
Externally published	Yes

All Science Journal Classification (ASJC) codes

Information Systems
Computer Science Applications
Library and Information Sciences

Keywords

MIMO downlink
multi-user diversity
semi-orthogonal user selection
zero-forcing beamforming

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10.1109/TIT.2011.2143810

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abstract = "We consider a flat fading multiantenna downlink system with a large number of users where the objective is to deliver equal rates to nonoutage users with a low complexity. We show that in the limit of a large number of users, a zero-forcing beamforming strategy combined with a low complexity user grouping algorithm based on a semi-orthogonal user selection achieves asymptotically optimal performance, with respect to an upper bound that can be achieved when no interference is present among users.",

keywords = "MIMO downlink, multi-user diversity, semi-orthogonal user selection, zero-forcing beamforming",

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AU - Foschini, Gerard J.

AU - Valenzuela, Reinaldo A.

AU - Goldsmith, Andrea J.

PY - 2011/6

Y1 - 2011/6

N2 - We consider a flat fading multiantenna downlink system with a large number of users where the objective is to deliver equal rates to nonoutage users with a low complexity. We show that in the limit of a large number of users, a zero-forcing beamforming strategy combined with a low complexity user grouping algorithm based on a semi-orthogonal user selection achieves asymptotically optimal performance, with respect to an upper bound that can be achieved when no interference is present among users.

AB - We consider a flat fading multiantenna downlink system with a large number of users where the objective is to deliver equal rates to nonoutage users with a low complexity. We show that in the limit of a large number of users, a zero-forcing beamforming strategy combined with a low complexity user grouping algorithm based on a semi-orthogonal user selection achieves asymptotically optimal performance, with respect to an upper bound that can be achieved when no interference is present among users.

KW - MIMO downlink

KW - multi-user diversity

KW - semi-orthogonal user selection

KW - zero-forcing beamforming

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ER -

Common rate support in multi-antenna downlink channels using semi-orthogonal user selection

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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