Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems

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

doi:10.1109/GLOCOM.2011.6133968

Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems

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

^*Corresponding author for this work

Beihang University
Georgia Institute of Technology
Huawei Technologies Co., Ltd.

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

7 Citations (Scopus)

Abstract

In this paper, power allocation between pilots and data symbols is investigated aiming at maximizing energy efficiency(EE) for downlink orthogonal frequency division multiple access (OFDMA) networks. We first derive an EE function when the channel estimation error is considered, which depends on the large-scale channel gains of multiple users, the allocated power to pilots and data symbols, and the circuit power consumption. Then an optimization problem is formulated to maximize the EE under overall transmit power constraint. The relationship between the power for pilots and data symbols is analyzed based on Karush-Kuhn-Tucker (KKT) conditions and the impacts of channel gains on both power allocation and the EE are studied. Exploiting the quasiconcavity property of the EE function, a bisection searching algorithm is developed to find the optimal power allocation. Simulation results demonstrate the performance gain of the proposed optimal power allocation scheme in terms of the EE and the required overall transmit power.

Original language	English
Title of host publication	2011 IEEE Global Telecommunications Conference, GLOBECOM 2011
DOIs	https://doi.org/10.1109/GLOCOM.2011.6133968
Publication status	Published - 2011
Externally published	Yes
Event	54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011 - Houston, TX, United States Duration: 5 Dec 2011 → 9 Dec 2011

Publication series

Name	GLOBECOM - IEEE Global Telecommunications Conference

Conference

Conference	54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011
Country/Territory	United States
City	Houston, TX
Period	5/12/11 → 9/12/11

UN SDGs

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

SDG 7 Affordable and Clean Energy

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10.1109/GLOCOM.2011.6133968

Cite this

@inproceedings{7640c6ddcc6b4dce9e60083d3d51ff89,

title = "Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems",

abstract = "In this paper, power allocation between pilots and data symbols is investigated aiming at maximizing energy efficiency(EE) for downlink orthogonal frequency division multiple access (OFDMA) networks. We first derive an EE function when the channel estimation error is considered, which depends on the large-scale channel gains of multiple users, the allocated power to pilots and data symbols, and the circuit power consumption. Then an optimization problem is formulated to maximize the EE under overall transmit power constraint. The relationship between the power for pilots and data symbols is analyzed based on Karush-Kuhn-Tucker (KKT) conditions and the impacts of channel gains on both power allocation and the EE are studied. Exploiting the quasiconcavity property of the EE function, a bisection searching algorithm is developed to find the optimal power allocation. Simulation results demonstrate the performance gain of the proposed optimal power allocation scheme in terms of the EE and the required overall transmit 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/GLOCOM.2011.6133968",

language = "English",

isbn = "9781424492688",

series = "GLOBECOM - IEEE Global Telecommunications Conference",

booktitle = "2011 IEEE Global Telecommunications Conference, GLOBECOM 2011",

note = "54th Annual IEEE Global Telecommunications Conference: {"}Energizing Global Communications{"}, GLOBECOM 2011 ; Conference date: 05-12-2011 Through 09-12-2011",

}

Xu, Z, Yang, C, Li, GY, Zhang, S, Chen, Y & Xu, S 2011, Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems. in 2011 IEEE Global Telecommunications Conference, GLOBECOM 2011., 6133968, GLOBECOM - IEEE Global Telecommunications Conference, 54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011, Houston, TX, United States, 5/12/11. https://doi.org/10.1109/GLOCOM.2011.6133968

Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems. / Xu, Zhikun; Yang, Chenyang; Li, Geoffrey Ye et al.
2011 IEEE Global Telecommunications Conference, GLOBECOM 2011. 2011. 6133968 (GLOBECOM - IEEE Global Telecommunications Conference).

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

TY - GEN

T1 - Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems

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, power allocation between pilots and data symbols is investigated aiming at maximizing energy efficiency(EE) for downlink orthogonal frequency division multiple access (OFDMA) networks. We first derive an EE function when the channel estimation error is considered, which depends on the large-scale channel gains of multiple users, the allocated power to pilots and data symbols, and the circuit power consumption. Then an optimization problem is formulated to maximize the EE under overall transmit power constraint. The relationship between the power for pilots and data symbols is analyzed based on Karush-Kuhn-Tucker (KKT) conditions and the impacts of channel gains on both power allocation and the EE are studied. Exploiting the quasiconcavity property of the EE function, a bisection searching algorithm is developed to find the optimal power allocation. Simulation results demonstrate the performance gain of the proposed optimal power allocation scheme in terms of the EE and the required overall transmit power.

AB - In this paper, power allocation between pilots and data symbols is investigated aiming at maximizing energy efficiency(EE) for downlink orthogonal frequency division multiple access (OFDMA) networks. We first derive an EE function when the channel estimation error is considered, which depends on the large-scale channel gains of multiple users, the allocated power to pilots and data symbols, and the circuit power consumption. Then an optimization problem is formulated to maximize the EE under overall transmit power constraint. The relationship between the power for pilots and data symbols is analyzed based on Karush-Kuhn-Tucker (KKT) conditions and the impacts of channel gains on both power allocation and the EE are studied. Exploiting the quasiconcavity property of the EE function, a bisection searching algorithm is developed to find the optimal power allocation. Simulation results demonstrate the performance gain of the proposed optimal power allocation scheme in terms of the EE and the required overall transmit power.

UR - https://www.scopus.com/pages/publications/84863163895

U2 - 10.1109/GLOCOM.2011.6133968

DO - 10.1109/GLOCOM.2011.6133968

M3 - Conference Proceeding

AN - SCOPUS:84863163895

SN - 9781424492688

T3 - GLOBECOM - IEEE Global Telecommunications Conference

BT - 2011 IEEE Global Telecommunications Conference, GLOBECOM 2011

T2 - 54th Annual IEEE Global Telecommunications Conference: "Energizing Global Communications", GLOBECOM 2011

Y2 - 5 December 2011 through 9 December 2011

ER -

Energy-efficient power allocation between pilots and data symbols in downlink OFDMA systems

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