Distributed closed-loop spatial multiplexing for uplink multiuser systems

Youngwook Ko, Cihan Tepedelenlioglu

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Focusing on the uplink, where mobile users (each with a single transmit antenna) communicate with a base station with multiple antennas, we treat multiple users as antennas to enable spatial multiplexing across users. Introducing distributed closed-loop spatial multiplexing with threshold-based user selection, we propose two uplink channel-assigning strategies with limited feedback. We prove that the proposed system also outperforms the standard greedy scheme with respect to the degree of fairness, measured by the variance of the time averaged throughput. For uplink multi-antenna systems, we show that the proposed scheduling is a better choice than the greedy scheme in terms of the average BER, feedback complexity, and fairness. The numerical results corroborate our findings.

Original languageEnglish (US)
Article number4450811
Pages (from-to)470-474
Number of pages5
JournalIEEE Transactions on Wireless Communications
Volume7
Issue number2
DOIs
StatePublished - Feb 2008

Fingerprint

Spatial multiplexing
Uplink
Multiplexing
Closed-loop
Antennas
Antenna
Fairness
Feedback
Limited Feedback
Multiple Antennas
Base stations
Throughput
Scheduling
Numerical Results

Keywords

  • Adaptive modulation
  • Fairness
  • Multi-antenna systems
  • Multiuser systems
  • Scheduling
  • Spatial multiplexing
  • Substream selection
  • Uplink

ASJC Scopus subject areas

  • Engineering(all)
  • Computer Networks and Communications

Cite this

Distributed closed-loop spatial multiplexing for uplink multiuser systems. / Ko, Youngwook; Tepedelenlioglu, Cihan.

In: IEEE Transactions on Wireless Communications, Vol. 7, No. 2, 4450811, 02.2008, p. 470-474.

Research output: Contribution to journalArticle

@article{a7c8b485d6424ed8b842770bd5919839,
title = "Distributed closed-loop spatial multiplexing for uplink multiuser systems",
abstract = "Focusing on the uplink, where mobile users (each with a single transmit antenna) communicate with a base station with multiple antennas, we treat multiple users as antennas to enable spatial multiplexing across users. Introducing distributed closed-loop spatial multiplexing with threshold-based user selection, we propose two uplink channel-assigning strategies with limited feedback. We prove that the proposed system also outperforms the standard greedy scheme with respect to the degree of fairness, measured by the variance of the time averaged throughput. For uplink multi-antenna systems, we show that the proposed scheduling is a better choice than the greedy scheme in terms of the average BER, feedback complexity, and fairness. The numerical results corroborate our findings.",
keywords = "Adaptive modulation, Fairness, Multi-antenna systems, Multiuser systems, Scheduling, Spatial multiplexing, Substream selection, Uplink",
author = "Youngwook Ko and Cihan Tepedelenlioglu",
year = "2008",
month = "2",
doi = "10.1109/TWC.2008.060679",
language = "English (US)",
volume = "7",
pages = "470--474",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "2",

}

TY - JOUR

T1 - Distributed closed-loop spatial multiplexing for uplink multiuser systems

AU - Ko, Youngwook

AU - Tepedelenlioglu, Cihan

PY - 2008/2

Y1 - 2008/2

N2 - Focusing on the uplink, where mobile users (each with a single transmit antenna) communicate with a base station with multiple antennas, we treat multiple users as antennas to enable spatial multiplexing across users. Introducing distributed closed-loop spatial multiplexing with threshold-based user selection, we propose two uplink channel-assigning strategies with limited feedback. We prove that the proposed system also outperforms the standard greedy scheme with respect to the degree of fairness, measured by the variance of the time averaged throughput. For uplink multi-antenna systems, we show that the proposed scheduling is a better choice than the greedy scheme in terms of the average BER, feedback complexity, and fairness. The numerical results corroborate our findings.

AB - Focusing on the uplink, where mobile users (each with a single transmit antenna) communicate with a base station with multiple antennas, we treat multiple users as antennas to enable spatial multiplexing across users. Introducing distributed closed-loop spatial multiplexing with threshold-based user selection, we propose two uplink channel-assigning strategies with limited feedback. We prove that the proposed system also outperforms the standard greedy scheme with respect to the degree of fairness, measured by the variance of the time averaged throughput. For uplink multi-antenna systems, we show that the proposed scheduling is a better choice than the greedy scheme in terms of the average BER, feedback complexity, and fairness. The numerical results corroborate our findings.

KW - Adaptive modulation

KW - Fairness

KW - Multi-antenna systems

KW - Multiuser systems

KW - Scheduling

KW - Spatial multiplexing

KW - Substream selection

KW - Uplink

UR - http://www.scopus.com/inward/record.url?scp=39749169004&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=39749169004&partnerID=8YFLogxK

U2 - 10.1109/TWC.2008.060679

DO - 10.1109/TWC.2008.060679

M3 - Article

AN - SCOPUS:39749169004

VL - 7

SP - 470

EP - 474

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 2

M1 - 4450811

ER -