A New Joint Estimation of Channels and the Number of Transmit Antennas for OFDM Systems with Antenna Diversity Employing Walsh Hadamard Codes
Summary :
We propose a new approach associated with the use of some selected sets of Walsh Hadamard codes for joint estimation of channels and the number of transmit antennas by employing only one OFDM pilot symbol. This allows transmit antenna diversity to be applied in systems which have a limited number of training symbols (preambles), e.g. HIPERLAN/2. The proposed approach does not require any a priori knowledge about the number of transmit antennas, providing flexibility in the number of antennas to be used. In addition, adaptive scheme associated with the proposed approach provides more accurate estimations of the channels. The effectiveness of the proposed approach is evaluated through simulation. Results show that the proposed scheme provides significant improvement over previous channel estimation schemes and has almost the same performance as the ideal system with the full knowledge of the channel state information.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E87-B No.2 pp.242-256
- Publication Date
- 2004/02/01
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technology
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Wichai PONGWILAI, Ryuji KOHNO, Sawasd TANTARATANA, "A New Joint Estimation of Channels and the Number of Transmit Antennas for OFDM Systems with Antenna Diversity Employing Walsh Hadamard Codes" in IEICE TRANSACTIONS on Communications,
vol. E87-B, no. 2, pp. 242-256, February 2004, doi: .
Abstract: We propose a new approach associated with the use of some selected sets of Walsh Hadamard codes for joint estimation of channels and the number of transmit antennas by employing only one OFDM pilot symbol. This allows transmit antenna diversity to be applied in systems which have a limited number of training symbols (preambles), e.g. HIPERLAN/2. The proposed approach does not require any a priori knowledge about the number of transmit antennas, providing flexibility in the number of antennas to be used. In addition, adaptive scheme associated with the proposed approach provides more accurate estimations of the channels. The effectiveness of the proposed approach is evaluated through simulation. Results show that the proposed scheme provides significant improvement over previous channel estimation schemes and has almost the same performance as the ideal system with the full knowledge of the channel state information.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e87-b_2_242/_p
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@ARTICLE{e87-b_2_242,
author={Wichai PONGWILAI, Ryuji KOHNO, Sawasd TANTARATANA, },
journal={IEICE TRANSACTIONS on Communications},
title={A New Joint Estimation of Channels and the Number of Transmit Antennas for OFDM Systems with Antenna Diversity Employing Walsh Hadamard Codes},
year={2004},
volume={E87-B},
number={2},
pages={242-256},
abstract={We propose a new approach associated with the use of some selected sets of Walsh Hadamard codes for joint estimation of channels and the number of transmit antennas by employing only one OFDM pilot symbol. This allows transmit antenna diversity to be applied in systems which have a limited number of training symbols (preambles), e.g. HIPERLAN/2. The proposed approach does not require any a priori knowledge about the number of transmit antennas, providing flexibility in the number of antennas to be used. In addition, adaptive scheme associated with the proposed approach provides more accurate estimations of the channels. The effectiveness of the proposed approach is evaluated through simulation. Results show that the proposed scheme provides significant improvement over previous channel estimation schemes and has almost the same performance as the ideal system with the full knowledge of the channel state information.},
keywords={},
doi={},
ISSN={},
month={February},}
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TY - JOUR
TI - A New Joint Estimation of Channels and the Number of Transmit Antennas for OFDM Systems with Antenna Diversity Employing Walsh Hadamard Codes
T2 - IEICE TRANSACTIONS on Communications
SP - 242
EP - 256
AU - Wichai PONGWILAI
AU - Ryuji KOHNO
AU - Sawasd TANTARATANA
PY - 2004
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E87-B
IS - 2
JA - IEICE TRANSACTIONS on Communications
Y1 - February 2004
AB - We propose a new approach associated with the use of some selected sets of Walsh Hadamard codes for joint estimation of channels and the number of transmit antennas by employing only one OFDM pilot symbol. This allows transmit antenna diversity to be applied in systems which have a limited number of training symbols (preambles), e.g. HIPERLAN/2. The proposed approach does not require any a priori knowledge about the number of transmit antennas, providing flexibility in the number of antennas to be used. In addition, adaptive scheme associated with the proposed approach provides more accurate estimations of the channels. The effectiveness of the proposed approach is evaluated through simulation. Results show that the proposed scheme provides significant improvement over previous channel estimation schemes and has almost the same performance as the ideal system with the full knowledge of the channel state information.
ER -
English
