Frame synchronization, channel estimation scheme and signal compensation using regression method in OFDM systems

  • Authors:

  • Jyh-Horng Wen;Gwo-Ruey Lee;Jia-Wei Liu;Te-Lung Kung

  • Affiliations:

  • Department of Electrical Engineering, Tunghai University No. 181, Section 3, Taichung Harbor Road, Taichung, Taiwan, ROC;Department of Electrical Engineering, National Chung Cheng University No. 168, University Road, Min-Hsiung ChiaYi, Taiwan, ROC;Department of Communication Engineering, National Chung Cheng University No. 168, University Road, Min-Hsiung ChiaYi, Taiwan, ROC;Department of Electrical Engineering, National Chung Cheng University No. 168, University Road, Min-Hsiung ChiaYi, Taiwan, ROC

  • Venue:
  • Computer Communications
  • Year:
  • 2008

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Abstract

In this paper, a joint frame synchronization and channel estimation scheme using the regression method is proposed. Based on an OFDM frame format with adding the pseudo-noise code, the frame timing and the channel impulse response could be obtained by the proposed scheme. With the estimated channel information, a frequency domain one-tap equalizer is presented to achieve the signal compensation. The simulation results show the missing probability of frame start with the proposed algorithm performs better than that with the moving average scheme and Beek's scheme under the Rayleigh channel. Also, the frame timing could be exactly obtained with the proposed schemes at SNR is large than -10dB. Besides, the estimator mean square error with the proposed channel estimation scheme is better than that with the least squared scheme and minimum mean square error scheme. With the estimated channel response, the signal could be compensated by the one-tap equalizer and the BER performance is shown in this paper.