The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Skim yang bersama-sama menganggarkan offset frekuensi pembawa dan saluran dicadangkan untuk sistem pemultipleksan bahagian frekuensi ortogon (OFDM). Dalam skema yang dicadangkan, offset frekuensi pembawa (CFO) dan maklumat keadaan saluran (CSI) dianggarkan terlebih dahulu oleh penganggar ralat min kuasa dua (MMSE) dan penganggar kemungkinan maksimum (ML). Dengan menukar maklumat anggaran antara kedua-dua penganggar ini, anggaran akhir CFO dan CSI kemudiannya diperoleh dengan kaedah berulang. Dalam proses berulang, kesan CSI yang tidak sempurna dipertimbangkan. Ia boleh meningkatkan ketepatan anggaran untuk mukadimah yang lebih pendek dan mempercepatkan kadar penumpuan berulang. Untuk mengurangkan kerumitan skim yang dicadangkan, prosedur diguna pakai untuk menghapuskan operasi songsang matriks kovarians yang dikira semula pada setiap lelaran. Di samping itu, syarat yang mencukupi untuk penumpuan kaedah yang dicadangkan disimpulkan. Keputusan simulasi berangka menunjukkan bahawa prestasi BER skim kami adalah lebih baik daripada MLE bersama untuk mukadimah yang lebih pendek dan setanding dengan MLE bersama untuk mukadimah yang lebih panjang. Tambahan pula, purata masa lelaran kaedah kami dikurangkan separuh berbanding kaedah MLE tanpa mengambil kira kesan CSI yang tidak sempurna.
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Salinan
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
Salinan
@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},}
Salinan
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 -