A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems

Chengyu LIN; Wenjun ZHANG; Feng YANG; Youyun XU

doi:10.1093/ietcom/e91-b.11.3764

A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems

Chengyu LIN, Wenjun ZHANG, Feng YANG, Youyun XU

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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.

Publication: IEICE TRANSACTIONS on Communications Vol.E91-B No.11 pp.3764-3767

Publication Date: 2008/11/01

Publicized

Online ISSN: 1745-1345

DOI: 10.1093/ietcom/e91-b.11.3764

Type of Manuscript: LETTER

Category: Wireless Communication Technologies

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Chengyu LIN, Wenjun ZHANG, Feng YANG, Youyun XU, "A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems" in IEICE TRANSACTIONS on Communications, vol. E91-B, no. 11, pp. 3764-3767, November 2008, doi: 10.1093/ietcom/e91-b.11.3764.
Abstract: 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.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.11.3764/_p

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@ARTICLE{e91-b_11_3764,
author={Chengyu LIN, Wenjun ZHANG, Feng YANG, Youyun XU, },
journal={IEICE TRANSACTIONS on Communications},
title={A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems},
year={2008},
volume={E91-B},
number={11},
pages={3764-3767},
abstract={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.},
keywords={},
doi={10.1093/ietcom/e91-b.11.3764},
ISSN={1745-1345},
month={November},}

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TY - JOUR
TI - A Novel Channel Estimation Method Using Virtual Pilots in MIMO OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 3764
EP - 3767
AU - Chengyu LIN
AU - Wenjun ZHANG
AU - Feng YANG
AU - Youyun XU
PY - 2008
DO - 10.1093/ietcom/e91-b.11.3764
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2008
AB - 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.
ER -