正交分頻多工系統中多天線之單一及多重載波頻率估測

Estimation of Single and Multiple Carrier Frequency Offsets in OFDM Systems with Multiple Antennas

游家賢(Chia-Hsien Yu)

指導教授 ： 馮世邁

國立臺灣大學/電機資訊學院/電信工程學研究所/碩士(2013年)

https://doi.org/10.6342/NTU.2013.00201

摘要

無資料

關鍵字

正交分頻多工 ； 載波頻率偏移 ； 頻率分析

並列摘要

Orthogonal frequency division multiplexing (OFDM) systems are sensitive to the carrier frequency offset (CFO), which degrades the performance of the system. Therefore, CFO estimation is an important issue in OFDM systems. The focus of this thesis is on CFO estimation in OFDM systems. This thesis first extends frequency analysis (FA) method to estimate carrier frequency offset in OFDM systems with more than two transmitting antennas. Then, we extend the FA method to multi-users. Finally, simulation results show the proposed method works in different settings.

並列關鍵字

OFDM ； CFO ； FA

參考文獻

[1] Lu Wu, Xian-Da Zhang, Pei-Sheng Li and Yong-Tao Su, "A Closed-form Blind CFO Estimator Based on Frequency Analysis for OFDM Systems," IEEE Transactions on Wireless Communication, vol. 57, pp. 1634-1637, June 2009.

[2] Lars Haring, Stefan Bieder, Andreas Czylwik, and Thomas Kaiser, "Estimation Algorithms of Multiple Channels and Carrier Frequency Offsets in Application to Multiuser OFDM Systems," IEEE Transactions on Wireless Communication, vol. 9, no. 3, March 2010.

[4] Zhi-Ting Huang, "Estimation of I/Q Imbalance and Carrier Frequency Offset for Orthogonal Space-Time Block Coded OFDM Systems," Master thesis, National Taiwan University, June, 2012.

[5] J. Yu and Y. Su, "Pilot-assisted maximum-likelihood frequency-offset estimation for OFDM systems," IEEE Trans. Commun., vol. 52, pp. 1997-2008, Nov. 2004.

[6] Y. Yao and G. B. Giannakis, "Blind carrier frequency offset estimation in SISO, MIMO, and multiuser OFDM system," IEEE Trans. Commun., vol. 53, pp. 173-183, Jan. 2005.