A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems
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概要
- 論文の詳細を見る
To improve the performance of the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, this letter proposes a novel channel estimation method using virtual pilot tones in multiple-input multiple-output (MIMO) orthogonal frequency division multiplexing (OFDM) systems. Assuming that the superimposed virtual pilot tones at the data locations over the specific sub-carriers are transmitted from all transmit antennas, the corresponding virtual received pilot signals at the same locations are obtained from the neighboring real received pilot signals over the same sub-carriers by Wiener filter. Based on the least squares (LS) channel estimation, the channel parameters can be obtained from the combination of the virtual and real received pilot signals over one OFDM symbol. Simulation results show that the proposed channel estimation method greatly outperforms the previous method for the optimal pilot sequences over multiple OFDM symbols in fast time-varying channels, as well as approaches the method for the comb-type optimal pilot sequences in performance.
- （社）電子情報通信学会の論文
- 2008-11-01
著者
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XU Youyun
Institute of Communication Engineering, PLA University of Science and Technology
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Xu Youyun
Institute Of Communication Engineering Pla University Of Science And Technology
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Yang Feng
Institute Analytical Science Southwest University
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Xu Youyun
Institute Of Image Communication And Information Processing Department Of Electronic Engineering Sha
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LIN Chengyu
Institute of Image Communication and Information Processing, Department of Electronic Engineering, S
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ZHANG Wenjun
Institute of Image Communication and Information Processing, Department of Electronic Engineering, S
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Yang Feng
Institute Of Image Communication And Information Processing Department Of Electronic Engineering Sha
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Lin Chengyu
Shanghai Jiao Tong Univ. Shanghai Chn
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Zhang Wenjun
Institute Of Image Communication And Information Processing Department Of Electronic Engineering Sha
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Zhang Wenjun
Institute Of Applied Entomology Zhejiang University
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