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IEICE Transactions on Communications 2006 E89-B(6):1947-1950; doi:10.1093/ietcom/e89-b.6.1947
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Copyright © 2006 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Wireless Communication Technologies

Impact of a Novel SNR Estimation Method on Adaptive OFDM System Performance in Slow Rayleigh Fading Channels*

Xiaodong XU1, Ya JING1, Xiaohu YOU1 and Junhui ZHAO2

1 The authors are with the National Mobile Communications Research Laboratory, Southeast University, Nanjing, P.R. China. E-mail: xudong{at}seu.edu.cn, 2 The author is with the Faculty of Information Technology, Macao University of Science and Technology, Macao, P.R. China.

In this letter, we propose an FFT-based SNR estimation method for wireless OFDM systems, and analyze the impact of the proposed SNR estimation method on adaptive OFDM performance in slow Rayleigh fading channels. Numerical and simulation results show that the proposed method is effective and feasible for adaptive modulation in slow Rayleigh fading channels.

Key Words: SNR estimation, adaptive modulation, OFDM

Manuscript received October 5, 2005. Manuscript revised January 3, 2006.

* This letter is supported by the National Natural Science Foundation of China (No.60496311).


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