Abstract
This paper addresses energy-efficient link adaptation for downlink multiuser multiple-input-multiple-output (MIMO) systems. Different from the previous works on energy efficient MIMO techniques, we take into account finite pilot power and the corresponding effect of imperfect channel state information (CSI) at the users. We analyze the average throughput and define the energy efficiency (EE) of downlink multiuser MIMO systems. We show that the EE of the system is not jointly quasi-concave with respect to pilot power, data power, and transmission rate. For this reason, we propose an efficient algorithm that alternately updates pilot power, data power, and transmission rate to improve the EE of the system. Simulation results show that the proposed scheme significantly enhances the EE, and the resulting EE is comparable to the maximal EE obtained by the exhaustive search.
| Original language | English |
|---|---|
| Article number | 6870454 |
| Pages (from-to) | 2692-2698 |
| Number of pages | 7 |
| Journal | IEEE Transactions on Vehicular Technology |
| Volume | 64 |
| Issue number | 6 |
| DOIs | |
| Publication status | Published - 2015 Jun 1 |
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All Science Journal Classification (ASJC) codes
- Automotive Engineering
- Aerospace Engineering
- Computer Networks and Communications
- Applied Mathematics
- Electrical and Electronic Engineering
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Energy-Efficient Adaptation of Pilot Power, Data Power, and Transmission Rate for Downlink Multiuser MIMO Systems. / Jang, Moonheok; Park, Hyunsung; Kwon, Younggap; Hwang, Taewon.
In: IEEE Transactions on Vehicular Technology, Vol. 64, No. 6, 6870454, 01.06.2015, p. 2692-2698.Research output: Contribution to journal › Article
TY - JOUR
T1 - Energy-Efficient Adaptation of Pilot Power, Data Power, and Transmission Rate for Downlink Multiuser MIMO Systems
AU - Jang, Moonheok
AU - Park, Hyunsung
AU - Kwon, Younggap
AU - Hwang, Taewon
PY - 2015/6/1
Y1 - 2015/6/1
N2 - This paper addresses energy-efficient link adaptation for downlink multiuser multiple-input-multiple-output (MIMO) systems. Different from the previous works on energy efficient MIMO techniques, we take into account finite pilot power and the corresponding effect of imperfect channel state information (CSI) at the users. We analyze the average throughput and define the energy efficiency (EE) of downlink multiuser MIMO systems. We show that the EE of the system is not jointly quasi-concave with respect to pilot power, data power, and transmission rate. For this reason, we propose an efficient algorithm that alternately updates pilot power, data power, and transmission rate to improve the EE of the system. Simulation results show that the proposed scheme significantly enhances the EE, and the resulting EE is comparable to the maximal EE obtained by the exhaustive search.
AB - This paper addresses energy-efficient link adaptation for downlink multiuser multiple-input-multiple-output (MIMO) systems. Different from the previous works on energy efficient MIMO techniques, we take into account finite pilot power and the corresponding effect of imperfect channel state information (CSI) at the users. We analyze the average throughput and define the energy efficiency (EE) of downlink multiuser MIMO systems. We show that the EE of the system is not jointly quasi-concave with respect to pilot power, data power, and transmission rate. For this reason, we propose an efficient algorithm that alternately updates pilot power, data power, and transmission rate to improve the EE of the system. Simulation results show that the proposed scheme significantly enhances the EE, and the resulting EE is comparable to the maximal EE obtained by the exhaustive search.
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UR - http://www.scopus.com/inward/citedby.url?scp=84933564558&partnerID=8YFLogxK
U2 - 10.1109/TVT.2014.2345195
DO - 10.1109/TVT.2014.2345195
M3 - Article
VL - 64
SP - 2692
EP - 2698
JO - IEEE Transactions on Vehicular Technology
JF - IEEE Transactions on Vehicular Technology
SN - 0018-9545
IS - 6
M1 - 6870454
ER -