The effects of modulation combination, target BER, doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel

Chang Jun Ahn, Iwao Sasase

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

OFDM is one of the promising modulation candidates for a fourth generation broadband mobile communication system because of its robustness against inter-symbol interference(ISI). Adaptive modulation scheme is also an efficient scheme to increase the transmission rate by changing the channel modulation scheme according to the estimated channel state information. Since its implementation depends on the channel environment of the system and control period by using feedback information, this paper presents an evaluation for the effects of various modulation scheme combination, target BER, Doppler frequency, and various adaptation interval as control period on the performance of adaptive OFDM. We also propose a predicted feedback information scheme which increases the adaptation interval using the predicted power estimation in order to reduce the transmission time of feedback information from receiver to transmitter. Computer simulation results show that the case with BPSK, QPSK and 16QAM modulation combination at target BER 10-2 achieves 2 Mbps improvement over other combination cases in high Doppler frequency. On the other hand, at target BER 10-3, the case with BPSK, QPSK, 8PSK and 16QAM modulation combination achieves 3 Mbps improvement compared to the case of target BER 10-2. It is also shown that the predicted feedback information scheme effectively reduces the transmission time of feedback information from the receiver to transmitter.

Original languageEnglish
Pages (from-to)167-174
Number of pages8
JournalIEEE Transactions on Consumer Electronics
Volume48
Issue number1
DOIs
Publication statusPublished - 2002 Feb

Fingerprint

Orthogonal frequency division multiplexing
Modulation
Feedback
Quadrature phase shift keying
Transmitters
Adaptive modulation
Mobile telecommunication systems
Channel state information
Computer simulation

Keywords

  • Adaptive Modulation
  • Feedback Information(FBI)
  • Mean Least Square(MLS)
  • OFDM

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Networks and Communications

Cite this

@article{d17aa5c0487f49ef8a7ff922c822f384,
title = "The effects of modulation combination, target BER, doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel",
abstract = "OFDM is one of the promising modulation candidates for a fourth generation broadband mobile communication system because of its robustness against inter-symbol interference(ISI). Adaptive modulation scheme is also an efficient scheme to increase the transmission rate by changing the channel modulation scheme according to the estimated channel state information. Since its implementation depends on the channel environment of the system and control period by using feedback information, this paper presents an evaluation for the effects of various modulation scheme combination, target BER, Doppler frequency, and various adaptation interval as control period on the performance of adaptive OFDM. We also propose a predicted feedback information scheme which increases the adaptation interval using the predicted power estimation in order to reduce the transmission time of feedback information from receiver to transmitter. Computer simulation results show that the case with BPSK, QPSK and 16QAM modulation combination at target BER 10-2 achieves 2 Mbps improvement over other combination cases in high Doppler frequency. On the other hand, at target BER 10-3, the case with BPSK, QPSK, 8PSK and 16QAM modulation combination achieves 3 Mbps improvement compared to the case of target BER 10-2. It is also shown that the predicted feedback information scheme effectively reduces the transmission time of feedback information from the receiver to transmitter.",
keywords = "Adaptive Modulation, Feedback Information(FBI), Mean Least Square(MLS), OFDM",
author = "Ahn, {Chang Jun} and Iwao Sasase",
year = "2002",
month = "2",
doi = "10.1109/TCE.2002.1010107",
language = "English",
volume = "48",
pages = "167--174",
journal = "IEEE Transactions on Consumer Electronics",
issn = "0098-3063",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "1",

}

TY - JOUR

T1 - The effects of modulation combination, target BER, doppler frequency, and adaptation interval on the performance of adaptive OFDM in broadband mobile channel

AU - Ahn, Chang Jun

AU - Sasase, Iwao

PY - 2002/2

Y1 - 2002/2

N2 - OFDM is one of the promising modulation candidates for a fourth generation broadband mobile communication system because of its robustness against inter-symbol interference(ISI). Adaptive modulation scheme is also an efficient scheme to increase the transmission rate by changing the channel modulation scheme according to the estimated channel state information. Since its implementation depends on the channel environment of the system and control period by using feedback information, this paper presents an evaluation for the effects of various modulation scheme combination, target BER, Doppler frequency, and various adaptation interval as control period on the performance of adaptive OFDM. We also propose a predicted feedback information scheme which increases the adaptation interval using the predicted power estimation in order to reduce the transmission time of feedback information from receiver to transmitter. Computer simulation results show that the case with BPSK, QPSK and 16QAM modulation combination at target BER 10-2 achieves 2 Mbps improvement over other combination cases in high Doppler frequency. On the other hand, at target BER 10-3, the case with BPSK, QPSK, 8PSK and 16QAM modulation combination achieves 3 Mbps improvement compared to the case of target BER 10-2. It is also shown that the predicted feedback information scheme effectively reduces the transmission time of feedback information from the receiver to transmitter.

AB - OFDM is one of the promising modulation candidates for a fourth generation broadband mobile communication system because of its robustness against inter-symbol interference(ISI). Adaptive modulation scheme is also an efficient scheme to increase the transmission rate by changing the channel modulation scheme according to the estimated channel state information. Since its implementation depends on the channel environment of the system and control period by using feedback information, this paper presents an evaluation for the effects of various modulation scheme combination, target BER, Doppler frequency, and various adaptation interval as control period on the performance of adaptive OFDM. We also propose a predicted feedback information scheme which increases the adaptation interval using the predicted power estimation in order to reduce the transmission time of feedback information from receiver to transmitter. Computer simulation results show that the case with BPSK, QPSK and 16QAM modulation combination at target BER 10-2 achieves 2 Mbps improvement over other combination cases in high Doppler frequency. On the other hand, at target BER 10-3, the case with BPSK, QPSK, 8PSK and 16QAM modulation combination achieves 3 Mbps improvement compared to the case of target BER 10-2. It is also shown that the predicted feedback information scheme effectively reduces the transmission time of feedback information from the receiver to transmitter.

KW - Adaptive Modulation

KW - Feedback Information(FBI)

KW - Mean Least Square(MLS)

KW - OFDM

UR - http://www.scopus.com/inward/record.url?scp=0036477371&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0036477371&partnerID=8YFLogxK

U2 - 10.1109/TCE.2002.1010107

DO - 10.1109/TCE.2002.1010107

M3 - Article

AN - SCOPUS:0036477371

VL - 48

SP - 167

EP - 174

JO - IEEE Transactions on Consumer Electronics

JF - IEEE Transactions on Consumer Electronics

SN - 0098-3063

IS - 1

ER -