Energy-efficient MIMO-OFDMA systems based on switching off RF chains

Zhikun Xu; Chenyang Yang; Geoffrey Ye Li; Shunqing Zhang; Yan Chen; Shugong Xu

doi:10.1109/VETECF.2011.6093106

Energy-efficient MIMO-OFDMA systems based on switching off RF chains

Zhikun Xu^*
, Chenyang Yang
, Geoffrey Ye Li
, Shunqing Zhang
, Yan Chen
, Shugong Xu

^*Corresponding author for this work

Research output: Chapter in Book or Report/Conference proceeding › Conference Proceeding › peer-review

16 Citations (Scopus)

Abstract

In this paper, both configuration of active radio frequency (RF) chains and resource allocation are investigated for improving energy efficiency of downlink multiple-input-multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems. We first formulate an optimization problem to minimize the total power consumed at the base station with the maximum transmit power constraint and ergodic capacity constraints from multiple users. Then a two-step suboptimal algorithm is proposed. Specifically, the continuous variable optimization problem is first solved, and then a discretization algorithm is presented to obtain the number of active RF chains and the number of subcarriers allocated to each user. Simulation results demonstrate that the proposed algorithm can provide significant power-saving gain over the all-on RF chain scheme and the adaptive subcarrier allocation helps to save more power.

Original language	English
Title of host publication	2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings
DOIs	https://doi.org/10.1109/VETECF.2011.6093106
Publication status	Published - 2011
Externally published	Yes
Event	IEEE 74th Vehicular Technology Conference, VTC Fall 2011 - San Francisco, CA, United States Duration: 5 Sept 2011 → 8 Sept 2011

Publication series

Name	IEEE Vehicular Technology Conference
ISSN (Print)	1550-2252

Conference

Conference	IEEE 74th Vehicular Technology Conference, VTC Fall 2011
Country/Territory	United States
City	San Francisco, CA
Period	5/09/11 → 8/09/11

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1109/VETECF.2011.6093106

Cite this

@inproceedings{bc46890619ca4bbfba7a419ad8bfeddf,

title = "Energy-efficient MIMO-OFDMA systems based on switching off RF chains",

abstract = "In this paper, both configuration of active radio frequency (RF) chains and resource allocation are investigated for improving energy efficiency of downlink multiple-input-multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems. We first formulate an optimization problem to minimize the total power consumed at the base station with the maximum transmit power constraint and ergodic capacity constraints from multiple users. Then a two-step suboptimal algorithm is proposed. Specifically, the continuous variable optimization problem is first solved, and then a discretization algorithm is presented to obtain the number of active RF chains and the number of subcarriers allocated to each user. Simulation results demonstrate that the proposed algorithm can provide significant power-saving gain over the all-on RF chain scheme and the adaptive subcarrier allocation helps to save more power.",

author = "Zhikun Xu and Chenyang Yang and Li, \{Geoffrey Ye\} and Shunqing Zhang and Yan Chen and Shugong Xu",

year = "2011",

doi = "10.1109/VETECF.2011.6093106",

language = "English",

isbn = "9781424483273",

series = "IEEE Vehicular Technology Conference",

booktitle = "2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings",

note = "IEEE 74th Vehicular Technology Conference, VTC Fall 2011 ; Conference date: 05-09-2011 Through 08-09-2011",

}

Xu, Z, Yang, C, Li, GY, Zhang, S, Chen, Y & Xu, S 2011, Energy-efficient MIMO-OFDMA systems based on switching off RF chains. in 2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings., 6093106, IEEE Vehicular Technology Conference, IEEE 74th Vehicular Technology Conference, VTC Fall 2011, San Francisco, CA, United States, 5/09/11. https://doi.org/10.1109/VETECF.2011.6093106

TY - GEN

T1 - Energy-efficient MIMO-OFDMA systems based on switching off RF chains

AU - Xu, Zhikun

AU - Yang, Chenyang

AU - Li, Geoffrey Ye

AU - Zhang, Shunqing

AU - Chen, Yan

AU - Xu, Shugong

PY - 2011

Y1 - 2011

N2 - In this paper, both configuration of active radio frequency (RF) chains and resource allocation are investigated for improving energy efficiency of downlink multiple-input-multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems. We first formulate an optimization problem to minimize the total power consumed at the base station with the maximum transmit power constraint and ergodic capacity constraints from multiple users. Then a two-step suboptimal algorithm is proposed. Specifically, the continuous variable optimization problem is first solved, and then a discretization algorithm is presented to obtain the number of active RF chains and the number of subcarriers allocated to each user. Simulation results demonstrate that the proposed algorithm can provide significant power-saving gain over the all-on RF chain scheme and the adaptive subcarrier allocation helps to save more power.

AB - In this paper, both configuration of active radio frequency (RF) chains and resource allocation are investigated for improving energy efficiency of downlink multiple-input-multiple-output (MIMO) orthogonal frequency division multiple access (OFDMA) systems. We first formulate an optimization problem to minimize the total power consumed at the base station with the maximum transmit power constraint and ergodic capacity constraints from multiple users. Then a two-step suboptimal algorithm is proposed. Specifically, the continuous variable optimization problem is first solved, and then a discretization algorithm is presented to obtain the number of active RF chains and the number of subcarriers allocated to each user. Simulation results demonstrate that the proposed algorithm can provide significant power-saving gain over the all-on RF chain scheme and the adaptive subcarrier allocation helps to save more power.

UR - https://www.scopus.com/pages/publications/83755181610

U2 - 10.1109/VETECF.2011.6093106

DO - 10.1109/VETECF.2011.6093106

M3 - Conference Proceeding

AN - SCOPUS:83755181610

SN - 9781424483273

T3 - IEEE Vehicular Technology Conference

BT - 2011 IEEE Vehicular Technology Conference Fall, VTC Fall 2011 - Proceedings

T2 - IEEE 74th Vehicular Technology Conference, VTC Fall 2011

Y2 - 5 September 2011 through 8 September 2011

ER -

Energy-efficient MIMO-OFDMA systems based on switching off RF chains

Abstract

Publication series

Conference

UN SDGs

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