IEICE TRANSACTIONS on Communications
High-Precision AFC Circuit Applied to 64QAM Point-to-Multipoint Burst Communications
Summary :
In this paper, we propose a novel open-loop Automatic Frequency Control (AFC) circuit suitable for 64QAM point-to-multipoint (P-MP) burst communications. The proposed AFC contains two frequency offset detectors. One estimates the phase rotation over long intervals to obtain accurate estimates at the cost of phase ambiguity. The other estimates the phase rotation over short intervals and its output is used to resolve the ambiguity in the following phase ambiguity compensator. Thus, the proposed AFC circuit calculates the phase rotation over sufficiently long periods to yield accurately estimate the carrier frequency offset while suppressing the phase-unwrapping problem. The proposed AFC approaches the Cramer-Rao bound (CRB) and so achieves very small residual frequency offset. The proposed AFC circuit can be implemented with much smaller circuit scale than the conventional devices. Computer simulations and experiments confirm that its residual frequency error is less than of 10-5 for the frame format considered; this performance is sufficient for the 64QAM -40 Mbaud system targeted.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E89-B No.12 pp.3288-3295
- Publication Date
- 2006/12/01
- Publicized
- Online ISSN
- 1745-1345
- DOI
- 10.1093/ietcom/e89-b.12.3288
- Type of Manuscript
- PAPER
- Category
- Transmission Systems and Transmission Equipment for Communications
Authors
Keyword
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Yushi SHIRATO, Kazuji WATANABE, "High-Precision AFC Circuit Applied to 64QAM Point-to-Multipoint Burst Communications" in IEICE TRANSACTIONS on Communications,
vol. E89-B, no. 12, pp. 3288-3295, December 2006, doi: 10.1093/ietcom/e89-b.12.3288.
Abstract: In this paper, we propose a novel open-loop Automatic Frequency Control (AFC) circuit suitable for 64QAM point-to-multipoint (P-MP) burst communications. The proposed AFC contains two frequency offset detectors. One estimates the phase rotation over long intervals to obtain accurate estimates at the cost of phase ambiguity. The other estimates the phase rotation over short intervals and its output is used to resolve the ambiguity in the following phase ambiguity compensator. Thus, the proposed AFC circuit calculates the phase rotation over sufficiently long periods to yield accurately estimate the carrier frequency offset while suppressing the phase-unwrapping problem. The proposed AFC approaches the Cramer-Rao bound (CRB) and so achieves very small residual frequency offset. The proposed AFC circuit can be implemented with much smaller circuit scale than the conventional devices. Computer simulations and experiments confirm that its residual frequency error is less than of 10-5 for the frame format considered; this performance is sufficient for the 64QAM -40 Mbaud system targeted.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e89-b.12.3288/_p
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@ARTICLE{e89-b_12_3288,
author={Yushi SHIRATO, Kazuji WATANABE, },
journal={IEICE TRANSACTIONS on Communications},
title={High-Precision AFC Circuit Applied to 64QAM Point-to-Multipoint Burst Communications},
year={2006},
volume={E89-B},
number={12},
pages={3288-3295},
abstract={In this paper, we propose a novel open-loop Automatic Frequency Control (AFC) circuit suitable for 64QAM point-to-multipoint (P-MP) burst communications. The proposed AFC contains two frequency offset detectors. One estimates the phase rotation over long intervals to obtain accurate estimates at the cost of phase ambiguity. The other estimates the phase rotation over short intervals and its output is used to resolve the ambiguity in the following phase ambiguity compensator. Thus, the proposed AFC circuit calculates the phase rotation over sufficiently long periods to yield accurately estimate the carrier frequency offset while suppressing the phase-unwrapping problem. The proposed AFC approaches the Cramer-Rao bound (CRB) and so achieves very small residual frequency offset. The proposed AFC circuit can be implemented with much smaller circuit scale than the conventional devices. Computer simulations and experiments confirm that its residual frequency error is less than of 10-5 for the frame format considered; this performance is sufficient for the 64QAM -40 Mbaud system targeted.},
keywords={},
doi={10.1093/ietcom/e89-b.12.3288},
ISSN={1745-1345},
month={December},}
Copy
TY - JOUR
TI - High-Precision AFC Circuit Applied to 64QAM Point-to-Multipoint Burst Communications
T2 - IEICE TRANSACTIONS on Communications
SP - 3288
EP - 3295
AU - Yushi SHIRATO
AU - Kazuji WATANABE
PY - 2006
DO - 10.1093/ietcom/e89-b.12.3288
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E89-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2006
AB - In this paper, we propose a novel open-loop Automatic Frequency Control (AFC) circuit suitable for 64QAM point-to-multipoint (P-MP) burst communications. The proposed AFC contains two frequency offset detectors. One estimates the phase rotation over long intervals to obtain accurate estimates at the cost of phase ambiguity. The other estimates the phase rotation over short intervals and its output is used to resolve the ambiguity in the following phase ambiguity compensator. Thus, the proposed AFC circuit calculates the phase rotation over sufficiently long periods to yield accurately estimate the carrier frequency offset while suppressing the phase-unwrapping problem. The proposed AFC approaches the Cramer-Rao bound (CRB) and so achieves very small residual frequency offset. The proposed AFC circuit can be implemented with much smaller circuit scale than the conventional devices. Computer simulations and experiments confirm that its residual frequency error is less than of 10-5 for the frame format considered; this performance is sufficient for the 64QAM -40 Mbaud system targeted.
ER -
English
