IEICE TRANSACTIONS on Communications
Joint Estimation of Channel and Control Signal Using Noise Subspace in OFDM Systems
Summary :
Accurate channel estimation is necessary before we can demodulate orthogonal frequency division multiplexing (OFDM) signals since the radio channel is frequency-selective and time-varying for wideband mobile communication systems. For pilot-symbol-aided channel estimation, pilot sequences are inserted periodically into the data stream enabling coherent detection at receiver. The control signal information can be embedded in pilot sequences and transmitted implicitly in OFDM systems to save the bandwidth. In order to estimate the channel and control signal jointly at the receiver, we propose a novel noise subspace based method in this paper. The proposed method is developed from the DFT-based channel estimator. If the hypothesized sequence coincides with the transmitted pilot sequence, the last part of the channel impulse response (CIR) estimate is only contributed by Gaussian noise and its average power is expected to be the minimum among all possible hypothesized sequences. Simulation results show that the proposed method works well in any of the channels even if integer carrier frequency offset (CFO) is considered.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E97-B No.11 pp.2404-2412
- Publication Date
- 2014/11/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1587/transcom.E97.B.2404
- Type of Manuscript
- PAPER
- Category
- Wireless Communication Technologies
Authors
Bin SHENG
Southeast University
Pengcheng ZHU
Southeast University
Xin FANG
Hangzhou Dianzi University
Wanlin LI
Southeast University
Keyword
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Bin SHENG, Pengcheng ZHU, Xin FANG, Wanlin LI, "Joint Estimation of Channel and Control Signal Using Noise Subspace in OFDM Systems" in IEICE TRANSACTIONS on Communications,
vol. E97-B, no. 11, pp. 2404-2412, November 2014, doi: 10.1587/transcom.E97.B.2404.
Abstract: Accurate channel estimation is necessary before we can demodulate orthogonal frequency division multiplexing (OFDM) signals since the radio channel is frequency-selective and time-varying for wideband mobile communication systems. For pilot-symbol-aided channel estimation, pilot sequences are inserted periodically into the data stream enabling coherent detection at receiver. The control signal information can be embedded in pilot sequences and transmitted implicitly in OFDM systems to save the bandwidth. In order to estimate the channel and control signal jointly at the receiver, we propose a novel noise subspace based method in this paper. The proposed method is developed from the DFT-based channel estimator. If the hypothesized sequence coincides with the transmitted pilot sequence, the last part of the channel impulse response (CIR) estimate is only contributed by Gaussian noise and its average power is expected to be the minimum among all possible hypothesized sequences. Simulation results show that the proposed method works well in any of the channels even if integer carrier frequency offset (CFO) is considered.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E97.B.2404/_p
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@ARTICLE{e97-b_11_2404,
author={Bin SHENG, Pengcheng ZHU, Xin FANG, Wanlin LI, },
journal={IEICE TRANSACTIONS on Communications},
title={Joint Estimation of Channel and Control Signal Using Noise Subspace in OFDM Systems},
year={2014},
volume={E97-B},
number={11},
pages={2404-2412},
abstract={Accurate channel estimation is necessary before we can demodulate orthogonal frequency division multiplexing (OFDM) signals since the radio channel is frequency-selective and time-varying for wideband mobile communication systems. For pilot-symbol-aided channel estimation, pilot sequences are inserted periodically into the data stream enabling coherent detection at receiver. The control signal information can be embedded in pilot sequences and transmitted implicitly in OFDM systems to save the bandwidth. In order to estimate the channel and control signal jointly at the receiver, we propose a novel noise subspace based method in this paper. The proposed method is developed from the DFT-based channel estimator. If the hypothesized sequence coincides with the transmitted pilot sequence, the last part of the channel impulse response (CIR) estimate is only contributed by Gaussian noise and its average power is expected to be the minimum among all possible hypothesized sequences. Simulation results show that the proposed method works well in any of the channels even if integer carrier frequency offset (CFO) is considered.},
keywords={},
doi={10.1587/transcom.E97.B.2404},
ISSN={1745-1345},
month={November},}
Copy
TY - JOUR
TI - Joint Estimation of Channel and Control Signal Using Noise Subspace in OFDM Systems
T2 - IEICE TRANSACTIONS on Communications
SP - 2404
EP - 2412
AU - Bin SHENG
AU - Pengcheng ZHU
AU - Xin FANG
AU - Wanlin LI
PY - 2014
DO - 10.1587/transcom.E97.B.2404
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E97-B
IS - 11
JA - IEICE TRANSACTIONS on Communications
Y1 - November 2014
AB - Accurate channel estimation is necessary before we can demodulate orthogonal frequency division multiplexing (OFDM) signals since the radio channel is frequency-selective and time-varying for wideband mobile communication systems. For pilot-symbol-aided channel estimation, pilot sequences are inserted periodically into the data stream enabling coherent detection at receiver. The control signal information can be embedded in pilot sequences and transmitted implicitly in OFDM systems to save the bandwidth. In order to estimate the channel and control signal jointly at the receiver, we propose a novel noise subspace based method in this paper. The proposed method is developed from the DFT-based channel estimator. If the hypothesized sequence coincides with the transmitted pilot sequence, the last part of the channel impulse response (CIR) estimate is only contributed by Gaussian noise and its average power is expected to be the minimum among all possible hypothesized sequences. Simulation results show that the proposed method works well in any of the channels even if integer carrier frequency offset (CFO) is considered.
ER -
English
