Performance analysis and optimization of best-M feedback for OFDMA systems

Mingyu Kang, Kwang Soon Kim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

In this paper, the best-M feedback, where each user reports the channel quality indicators (CQIs) on its M best resource blocks (RBs), for orthogonal frequency division multiple access (OFDMA) systems is analyzed and optimized. First, the closed-form expression of the average sum-rate is derived as a function of M and the number of bits for a signal to noise ratio (SNR) quantization B. Then, M and B are jointly optimized to minimize the feedback overhead such that the desired system performance can be achieved. Numerical results confirm that the proposed analysis is quite well matched to the exact result so that our work is useful to optimize M and B instead of time-consuming computer simulations, and that the required feedback overhead to achieve a given performance decreases as the number of users and the average SNR increase.

Original languageEnglish
Article number6297423
Pages (from-to)1648-1651
Number of pages4
JournalIEEE Communications Letters
Volume16
Issue number10
DOIs
Publication statusPublished - 2012 Sep 12

Fingerprint

Frequency division multiple access
Orthogonal Frequency Division multiple Access (OFDMA)
Performance Optimization
Performance Analysis
Feedback
Signal to noise ratio
Exact Results
System Performance
Quantization
Closed-form
Computer Simulation
Optimise
Minimise
Numerical Results
Decrease
Resources
Computer simulation

All Science Journal Classification (ASJC) codes

  • Modelling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering

Cite this

@article{3a1aef5aa1e64579a84d20649d9d506d,
title = "Performance analysis and optimization of best-M feedback for OFDMA systems",
abstract = "In this paper, the best-M feedback, where each user reports the channel quality indicators (CQIs) on its M best resource blocks (RBs), for orthogonal frequency division multiple access (OFDMA) systems is analyzed and optimized. First, the closed-form expression of the average sum-rate is derived as a function of M and the number of bits for a signal to noise ratio (SNR) quantization B. Then, M and B are jointly optimized to minimize the feedback overhead such that the desired system performance can be achieved. Numerical results confirm that the proposed analysis is quite well matched to the exact result so that our work is useful to optimize M and B instead of time-consuming computer simulations, and that the required feedback overhead to achieve a given performance decreases as the number of users and the average SNR increase.",
author = "Mingyu Kang and Kim, {Kwang Soon}",
year = "2012",
month = "9",
day = "12",
doi = "10.1109/LCOMM.2012.090312.121556",
language = "English",
volume = "16",
pages = "1648--1651",
journal = "IEEE Communications Letters",
issn = "1089-7798",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "10",

}

Performance analysis and optimization of best-M feedback for OFDMA systems. / Kang, Mingyu; Kim, Kwang Soon.

In: IEEE Communications Letters, Vol. 16, No. 10, 6297423, 12.09.2012, p. 1648-1651.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Performance analysis and optimization of best-M feedback for OFDMA systems

AU - Kang, Mingyu

AU - Kim, Kwang Soon

PY - 2012/9/12

Y1 - 2012/9/12

N2 - In this paper, the best-M feedback, where each user reports the channel quality indicators (CQIs) on its M best resource blocks (RBs), for orthogonal frequency division multiple access (OFDMA) systems is analyzed and optimized. First, the closed-form expression of the average sum-rate is derived as a function of M and the number of bits for a signal to noise ratio (SNR) quantization B. Then, M and B are jointly optimized to minimize the feedback overhead such that the desired system performance can be achieved. Numerical results confirm that the proposed analysis is quite well matched to the exact result so that our work is useful to optimize M and B instead of time-consuming computer simulations, and that the required feedback overhead to achieve a given performance decreases as the number of users and the average SNR increase.

AB - In this paper, the best-M feedback, where each user reports the channel quality indicators (CQIs) on its M best resource blocks (RBs), for orthogonal frequency division multiple access (OFDMA) systems is analyzed and optimized. First, the closed-form expression of the average sum-rate is derived as a function of M and the number of bits for a signal to noise ratio (SNR) quantization B. Then, M and B are jointly optimized to minimize the feedback overhead such that the desired system performance can be achieved. Numerical results confirm that the proposed analysis is quite well matched to the exact result so that our work is useful to optimize M and B instead of time-consuming computer simulations, and that the required feedback overhead to achieve a given performance decreases as the number of users and the average SNR increase.

UR - http://www.scopus.com/inward/record.url?scp=84867871868&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84867871868&partnerID=8YFLogxK

U2 - 10.1109/LCOMM.2012.090312.121556

DO - 10.1109/LCOMM.2012.090312.121556

M3 - Article

VL - 16

SP - 1648

EP - 1651

JO - IEEE Communications Letters

JF - IEEE Communications Letters

SN - 1089-7798

IS - 10

M1 - 6297423

ER -