On the optimal downlink power allocation for multi-carrier OFCDM wireless networks

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

The main purpose of this paper is to provide theoretic insights into capacity and resource allocation for the downlink of the multicarrier system. Throughout the paper, our objective is to maximize the total throughput (bits/sec/hertz). We assume that multiple users may simultaneously access a subcarrier with the code division multiple access. We show that the user with the best channel gain should be always assigned the corresponding carrier. Further, we quantify the conditions under which either single-user or multiple-user occupancy of a carrier is optimal. For the single-user case, the so called water-filling downlink power allocation is required. On the other hand, for the multiple-user case, careful consideration is needed in selecting users and powers. The optimal resource allocation improves the throughput, for which we also suggest sub-optimal algorithms of a lower complexity. However, our general conclusion is that the single-user transmission together with the equal-power allocation is still a good strategy.

Original languageEnglish
Title of host publication2006 Wireless Telecommunications Symposium, WTS
DOIs
Publication statusPublished - 2006 Dec 1
Event2006 Wireless Telecommunications Symposium, WTS - Pomona, CA, United States
Duration: 2006 Apr 272006 Apr 29

Other

Other2006 Wireless Telecommunications Symposium, WTS
CountryUnited States
CityPomona, CA
Period06/4/2706/4/29

Fingerprint

Resource allocation
Wireless networks
Throughput
Code division multiple access
Water
resources
water

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications
  • Communication

Cite this

@inproceedings{ea62fe7227384b809dd2a273ad9f391f,
title = "On the optimal downlink power allocation for multi-carrier OFCDM wireless networks",
abstract = "The main purpose of this paper is to provide theoretic insights into capacity and resource allocation for the downlink of the multicarrier system. Throughout the paper, our objective is to maximize the total throughput (bits/sec/hertz). We assume that multiple users may simultaneously access a subcarrier with the code division multiple access. We show that the user with the best channel gain should be always assigned the corresponding carrier. Further, we quantify the conditions under which either single-user or multiple-user occupancy of a carrier is optimal. For the single-user case, the so called water-filling downlink power allocation is required. On the other hand, for the multiple-user case, careful consideration is needed in selecting users and powers. The optimal resource allocation improves the throughput, for which we also suggest sub-optimal algorithms of a lower complexity. However, our general conclusion is that the single-user transmission together with the equal-power allocation is still a good strategy.",
author = "Jeonghoon Mo and Kim, {Seong Lyun}",
year = "2006",
month = "12",
day = "1",
doi = "10.1109/WTS.2006.334530",
language = "English",
isbn = "1424400465",
booktitle = "2006 Wireless Telecommunications Symposium, WTS",

}

Mo, J & Kim, SL 2006, On the optimal downlink power allocation for multi-carrier OFCDM wireless networks. in 2006 Wireless Telecommunications Symposium, WTS., 4135334, 2006 Wireless Telecommunications Symposium, WTS, Pomona, CA, United States, 06/4/27. https://doi.org/10.1109/WTS.2006.334530

On the optimal downlink power allocation for multi-carrier OFCDM wireless networks. / Mo, Jeonghoon; Kim, Seong Lyun.

2006 Wireless Telecommunications Symposium, WTS. 2006. 4135334.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

TY - GEN

T1 - On the optimal downlink power allocation for multi-carrier OFCDM wireless networks

AU - Mo, Jeonghoon

AU - Kim, Seong Lyun

PY - 2006/12/1

Y1 - 2006/12/1

N2 - The main purpose of this paper is to provide theoretic insights into capacity and resource allocation for the downlink of the multicarrier system. Throughout the paper, our objective is to maximize the total throughput (bits/sec/hertz). We assume that multiple users may simultaneously access a subcarrier with the code division multiple access. We show that the user with the best channel gain should be always assigned the corresponding carrier. Further, we quantify the conditions under which either single-user or multiple-user occupancy of a carrier is optimal. For the single-user case, the so called water-filling downlink power allocation is required. On the other hand, for the multiple-user case, careful consideration is needed in selecting users and powers. The optimal resource allocation improves the throughput, for which we also suggest sub-optimal algorithms of a lower complexity. However, our general conclusion is that the single-user transmission together with the equal-power allocation is still a good strategy.

AB - The main purpose of this paper is to provide theoretic insights into capacity and resource allocation for the downlink of the multicarrier system. Throughout the paper, our objective is to maximize the total throughput (bits/sec/hertz). We assume that multiple users may simultaneously access a subcarrier with the code division multiple access. We show that the user with the best channel gain should be always assigned the corresponding carrier. Further, we quantify the conditions under which either single-user or multiple-user occupancy of a carrier is optimal. For the single-user case, the so called water-filling downlink power allocation is required. On the other hand, for the multiple-user case, careful consideration is needed in selecting users and powers. The optimal resource allocation improves the throughput, for which we also suggest sub-optimal algorithms of a lower complexity. However, our general conclusion is that the single-user transmission together with the equal-power allocation is still a good strategy.

UR - http://www.scopus.com/inward/record.url?scp=51349148517&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=51349148517&partnerID=8YFLogxK

U2 - 10.1109/WTS.2006.334530

DO - 10.1109/WTS.2006.334530

M3 - Conference contribution

SN - 1424400465

SN - 9781424400461

BT - 2006 Wireless Telecommunications Symposium, WTS

ER -