Serial Iterative Joint Carrier Frequency Synchronization and Channel Estimation for OFDM

Shaopeng WANG; Shihua ZHU; Yi LI

doi:10.1587/transcom.E93.B.1906

Serial Iterative Joint Carrier Frequency Synchronization and Channel Estimation for OFDM

Shaopeng WANG, Shihua ZHU, Yi LI

Full Text Views

0

Cite this

Summary :

A scheme that jointly estimates carrier frequency offset and channel is proposed for the orthogonal frequency division multiplexing (OFDM) system. In the proposed scheme, the carrier frequency offset (CFO) and the channel state information (CSI) are first estimated by an minimum mean square error (MMSE) estimator and an maximum likelihood (ML) estimator, respectively. By exchanging the estimation information between these two estimators, the final estimation of CFO and CSI is then obtained by an iterative method. In the iterative process, the effect of imperfect CSI is considered. It can improve the estimation precision for a shorter preamble and accelerate the iterative convergence rate. To reduce the complexity of the proposed scheme, a procedure is adopted to eliminate the inverse operation of covariance matrix that is recalculated at each iteration. In addition, a sufficient condition for the convergence of the proposed method is deduced. The numerical simulation results show that the BER performance of our scheme is better than that of joint MLE for a shorter preamble and is comparable to that of joint MLE for a longer preamble. Furthermore, the average iterative time of our method is reduced by half as compared to the MLE methods without considering the effect of imperfect CSI.

Publication: IEICE TRANSACTIONS on Communications Vol.E93-B No.7 pp.1906-1911

Publication Date: 2010/07/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1587/transcom.E93.B.1906

Type of Manuscript: PAPER

Category: Wireless Communication Technologies

Cite this

Copy

Shaopeng WANG, Shihua ZHU, Yi LI, "Serial Iterative Joint Carrier Frequency Synchronization and Channel Estimation for OFDM" in IEICE TRANSACTIONS on Communications, vol. E93-B, no. 7, pp. 1906-1911, July 2010, doi: 10.1587/transcom.E93.B.1906.
Abstract: A scheme that jointly estimates carrier frequency offset and channel is proposed for the orthogonal frequency division multiplexing (OFDM) system. In the proposed scheme, the carrier frequency offset (CFO) and the channel state information (CSI) are first estimated by an minimum mean square error (MMSE) estimator and an maximum likelihood (ML) estimator, respectively. By exchanging the estimation information between these two estimators, the final estimation of CFO and CSI is then obtained by an iterative method. In the iterative process, the effect of imperfect CSI is considered. It can improve the estimation precision for a shorter preamble and accelerate the iterative convergence rate. To reduce the complexity of the proposed scheme, a procedure is adopted to eliminate the inverse operation of covariance matrix that is recalculated at each iteration. In addition, a sufficient condition for the convergence of the proposed method is deduced. The numerical simulation results show that the BER performance of our scheme is better than that of joint MLE for a shorter preamble and is comparable to that of joint MLE for a longer preamble. Furthermore, the average iterative time of our method is reduced by half as compared to the MLE methods without considering the effect of imperfect CSI.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E93.B.1906/_p

Copy

@ARTICLE{e93-b_7_1906,
author={Shaopeng WANG, Shihua ZHU, Yi LI, },
journal={IEICE TRANSACTIONS on Communications},
title={Serial Iterative Joint Carrier Frequency Synchronization and Channel Estimation for OFDM},
year={2010},
volume={E93-B},
number={7},
pages={1906-1911},
abstract={A scheme that jointly estimates carrier frequency offset and channel is proposed for the orthogonal frequency division multiplexing (OFDM) system. In the proposed scheme, the carrier frequency offset (CFO) and the channel state information (CSI) are first estimated by an minimum mean square error (MMSE) estimator and an maximum likelihood (ML) estimator, respectively. By exchanging the estimation information between these two estimators, the final estimation of CFO and CSI is then obtained by an iterative method. In the iterative process, the effect of imperfect CSI is considered. It can improve the estimation precision for a shorter preamble and accelerate the iterative convergence rate. To reduce the complexity of the proposed scheme, a procedure is adopted to eliminate the inverse operation of covariance matrix that is recalculated at each iteration. In addition, a sufficient condition for the convergence of the proposed method is deduced. The numerical simulation results show that the BER performance of our scheme is better than that of joint MLE for a shorter preamble and is comparable to that of joint MLE for a longer preamble. Furthermore, the average iterative time of our method is reduced by half as compared to the MLE methods without considering the effect of imperfect CSI.},
keywords={},
doi={10.1587/transcom.E93.B.1906},
ISSN={1745-1345},
month={July},}

Copy

TY - JOUR
TI - Serial Iterative Joint Carrier Frequency Synchronization and Channel Estimation for OFDM
T2 - IEICE TRANSACTIONS on Communications
SP - 1906
EP - 1911
AU - Shaopeng WANG
AU - Shihua ZHU
AU - Yi LI
PY - 2010
DO - 10.1587/transcom.E93.B.1906
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E93-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2010
AB - A scheme that jointly estimates carrier frequency offset and channel is proposed for the orthogonal frequency division multiplexing (OFDM) system. In the proposed scheme, the carrier frequency offset (CFO) and the channel state information (CSI) are first estimated by an minimum mean square error (MMSE) estimator and an maximum likelihood (ML) estimator, respectively. By exchanging the estimation information between these two estimators, the final estimation of CFO and CSI is then obtained by an iterative method. In the iterative process, the effect of imperfect CSI is considered. It can improve the estimation precision for a shorter preamble and accelerate the iterative convergence rate. To reduce the complexity of the proposed scheme, a procedure is adopted to eliminate the inverse operation of covariance matrix that is recalculated at each iteration. In addition, a sufficient condition for the convergence of the proposed method is deduced. The numerical simulation results show that the BER performance of our scheme is better than that of joint MLE for a shorter preamble and is comparable to that of joint MLE for a longer preamble. Furthermore, the average iterative time of our method is reduced by half as compared to the MLE methods without considering the effect of imperfect CSI.
ER -