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Channel estimation technique in multi-antenna AF relay communication systems

  • Published:
Journal of Electronics (China)

Abstract

The channel estimation technique is investigated in OFDM communication systems with multi-antenna Amplify-and-Forward (AF) relay. The Space-Time Block Code (STBC) is applied at the transmitter of the relay to obtain diversity gain. According to the transmission characteristics of OFDM symbols on multiple antennas, a pilot-aided Linear Minimum Mean-Square-Error (LMMSE) channel estimation algorithm with low complexity is designed. Simulation results show that, the proposed LMMSE estimator outperforms least-square estimator and approaches the optimal estimator without error in the performance of Symbol Error Ratio (SER) under several modulation modes, and has a good estimation effect in the realistic relay communication scenario.

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Authors and Affiliations

  1. College of Communication and Information, Nanjing University of Posts and Telecommunications, Nanjing, 210003, China

    Mingxue Chen & Chengqi Xu

  2. Nanjing Instititue of Technology, Nanjing, 211167, China

    Mingxue Chen

Authors
  1. Mingxue Chen
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  2. Chengqi Xu
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Corresponding author

Correspondence to Mingxue Chen.

Additional information

Supported by the National Natural Science Foundation of Jiangsu province(No. 08KJB510015).

Communication author: Chen Mingxue, born in 1972, male, Ph.D. candidate. College of Communication and Information, Nanjing University of Posts and Telecommunications, Nanjing 210003, China.

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Chen, M., Xu, C. Channel estimation technique in multi-antenna AF relay communication systems. J. Electron.(China) 28, 22–29 (2011). https://doi.org/10.1007/s11767-011-0509-9

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  • DOI: https://doi.org/10.1007/s11767-011-0509-9

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