Low complexity pilot assisted carrier frequency offset estimation for OFDMA uplink systems

Kilbom Lee, Sung Hyun Moon, Sang Rim Lee, Inkyu Lee

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

In this letter, we propose a low complexity pilot aided carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiplexing access (OFDMA) uplink systems based on two consecutive received OFDMA symbols. Assuming that the channels and the CFOs are static over the two consecutive symbols, we express the second received OFDMA symbol in terms of the CFOs and the first OFDMA symbol. Based on this signal model, a new estimation algorithm which obtains the CFOs by minimizing the mean square distance between the received OFDMA symbol and its regenerated signal is provided. Also, we implement the proposed algorithm via fast Fourier transform (FFT) operations by utilizing the block matrix inversion lemma and the conjugate gradient method. Simulation results show that the proposed algorithm approaches the average Cramer Rao bound for moderate and high signal to noise ratio (SNR) regions. Moreover, the algorithm can be applied for any carrier assignment schemes with low complexity.

Original languageEnglish
Article number6210331
Pages (from-to)2690-2695
Number of pages6
JournalIEEE Transactions on Wireless Communications
Volume11
Issue number8
DOIs
Publication statusPublished - 2012 Jun 8

Fingerprint

Carrier Frequency Offset
Uplink
Orthogonal Frequency Division multiplexing (OFDM)
Low Complexity
Orthogonal frequency division multiplexing
Estimation Algorithms
Consecutive
Cramér-Rao Bound
Cramer-Rao bounds
Matrix Inversion
Conjugate gradient method
Block Matrix
Conjugate Gradient Method
Fast Fourier transform
Fast Fourier transforms
Mean Square
Lemma
Signal to noise ratio
Assignment
Express

Keywords

  • CFO
  • estimation
  • OFDMA
  • synchronization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Computer Science Applications
  • Applied Mathematics

Cite this

Low complexity pilot assisted carrier frequency offset estimation for OFDMA uplink systems. / Lee, Kilbom; Moon, Sung Hyun; Lee, Sang Rim; Lee, Inkyu.

In: IEEE Transactions on Wireless Communications, Vol. 11, No. 8, 6210331, 08.06.2012, p. 2690-2695.

Research output: Contribution to journalArticle

@article{6a5effca4ad14874b5ec6a8ca91b8b79,
title = "Low complexity pilot assisted carrier frequency offset estimation for OFDMA uplink systems",
abstract = "In this letter, we propose a low complexity pilot aided carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiplexing access (OFDMA) uplink systems based on two consecutive received OFDMA symbols. Assuming that the channels and the CFOs are static over the two consecutive symbols, we express the second received OFDMA symbol in terms of the CFOs and the first OFDMA symbol. Based on this signal model, a new estimation algorithm which obtains the CFOs by minimizing the mean square distance between the received OFDMA symbol and its regenerated signal is provided. Also, we implement the proposed algorithm via fast Fourier transform (FFT) operations by utilizing the block matrix inversion lemma and the conjugate gradient method. Simulation results show that the proposed algorithm approaches the average Cramer Rao bound for moderate and high signal to noise ratio (SNR) regions. Moreover, the algorithm can be applied for any carrier assignment schemes with low complexity.",
keywords = "CFO, estimation, OFDMA, synchronization",
author = "Kilbom Lee and Moon, {Sung Hyun} and Lee, {Sang Rim} and Inkyu Lee",
year = "2012",
month = "6",
day = "8",
doi = "10.1109/TWC.2012.052512.111241",
language = "English",
volume = "11",
pages = "2690--2695",
journal = "IEEE Transactions on Wireless Communications",
issn = "1536-1276",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
number = "8",

}

TY - JOUR

T1 - Low complexity pilot assisted carrier frequency offset estimation for OFDMA uplink systems

AU - Lee, Kilbom

AU - Moon, Sung Hyun

AU - Lee, Sang Rim

AU - Lee, Inkyu

PY - 2012/6/8

Y1 - 2012/6/8

N2 - In this letter, we propose a low complexity pilot aided carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiplexing access (OFDMA) uplink systems based on two consecutive received OFDMA symbols. Assuming that the channels and the CFOs are static over the two consecutive symbols, we express the second received OFDMA symbol in terms of the CFOs and the first OFDMA symbol. Based on this signal model, a new estimation algorithm which obtains the CFOs by minimizing the mean square distance between the received OFDMA symbol and its regenerated signal is provided. Also, we implement the proposed algorithm via fast Fourier transform (FFT) operations by utilizing the block matrix inversion lemma and the conjugate gradient method. Simulation results show that the proposed algorithm approaches the average Cramer Rao bound for moderate and high signal to noise ratio (SNR) regions. Moreover, the algorithm can be applied for any carrier assignment schemes with low complexity.

AB - In this letter, we propose a low complexity pilot aided carrier frequency offset (CFO) estimation algorithm for orthogonal frequency division multiplexing access (OFDMA) uplink systems based on two consecutive received OFDMA symbols. Assuming that the channels and the CFOs are static over the two consecutive symbols, we express the second received OFDMA symbol in terms of the CFOs and the first OFDMA symbol. Based on this signal model, a new estimation algorithm which obtains the CFOs by minimizing the mean square distance between the received OFDMA symbol and its regenerated signal is provided. Also, we implement the proposed algorithm via fast Fourier transform (FFT) operations by utilizing the block matrix inversion lemma and the conjugate gradient method. Simulation results show that the proposed algorithm approaches the average Cramer Rao bound for moderate and high signal to noise ratio (SNR) regions. Moreover, the algorithm can be applied for any carrier assignment schemes with low complexity.

KW - CFO

KW - estimation

KW - OFDMA

KW - synchronization

UR - http://www.scopus.com/inward/record.url?scp=84865382683&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84865382683&partnerID=8YFLogxK

U2 - 10.1109/TWC.2012.052512.111241

DO - 10.1109/TWC.2012.052512.111241

M3 - Article

AN - SCOPUS:84865382683

VL - 11

SP - 2690

EP - 2695

JO - IEEE Transactions on Wireless Communications

JF - IEEE Transactions on Wireless Communications

SN - 1536-1276

IS - 8

M1 - 6210331

ER -