A New AFC Circuit Employing Double-Product Type Frequency Discriminator in Very-Low CNR Environments
Summary :
This paper proposes a new AFC (automatic frequency control) circuit employing a double-product type frequency discriminator to enable fast acquisition in very-low CNR (carrier to noise power ratio) environments. The frequency step responses of the proposed AFC circuit are theoretically analyzed. In addition this paper evaluates the performance of the proposed AFC circuit by computer simulation in very-low CNR environments. The simulation results confirm that click noise at the frequency discriminator causes large frequency tracking error and that this error can be improved by increasing the delay time of the double-product type frequency discriminator. The frequency error can be also reduced by introducing the proposed frequency discriminator to modify the frequency error detection performance. The acquisition time of the proposed AFC circuit can be reduced by about 100 symbols compared to the conventional cross-product type AFC circuit.
- Publication
- IEICE TRANSACTIONS on Communications Vol.E80-B No.1 pp.25-32
- Publication Date
- 1997/01/25
- Publicized
- Online ISSN
- DOI
- Type of Manuscript
- Special Section PAPER (Special Issue on Advances in Satellite Communications toward Multimedia Era)
- Category
- Modem and Coding
Authors
Keyword
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Nobuaki MOCHIZUKI, Takatoshi SUGIYAMA, Masahiro UMEHIRA, "A New AFC Circuit Employing Double-Product Type Frequency Discriminator in Very-Low CNR Environments" in IEICE TRANSACTIONS on Communications,
vol. E80-B, no. 1, pp. 25-32, January 1997, doi: .
Abstract: This paper proposes a new AFC (automatic frequency control) circuit employing a double-product type frequency discriminator to enable fast acquisition in very-low CNR (carrier to noise power ratio) environments. The frequency step responses of the proposed AFC circuit are theoretically analyzed. In addition this paper evaluates the performance of the proposed AFC circuit by computer simulation in very-low CNR environments. The simulation results confirm that click noise at the frequency discriminator causes large frequency tracking error and that this error can be improved by increasing the delay time of the double-product type frequency discriminator. The frequency error can be also reduced by introducing the proposed frequency discriminator to modify the frequency error detection performance. The acquisition time of the proposed AFC circuit can be reduced by about 100 symbols compared to the conventional cross-product type AFC circuit.
URL: https://global.ieice.org/en_transactions/communications/10.1587/e80-b_1_25/_p
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@ARTICLE{e80-b_1_25,
author={Nobuaki MOCHIZUKI, Takatoshi SUGIYAMA, Masahiro UMEHIRA, },
journal={IEICE TRANSACTIONS on Communications},
title={A New AFC Circuit Employing Double-Product Type Frequency Discriminator in Very-Low CNR Environments},
year={1997},
volume={E80-B},
number={1},
pages={25-32},
abstract={This paper proposes a new AFC (automatic frequency control) circuit employing a double-product type frequency discriminator to enable fast acquisition in very-low CNR (carrier to noise power ratio) environments. The frequency step responses of the proposed AFC circuit are theoretically analyzed. In addition this paper evaluates the performance of the proposed AFC circuit by computer simulation in very-low CNR environments. The simulation results confirm that click noise at the frequency discriminator causes large frequency tracking error and that this error can be improved by increasing the delay time of the double-product type frequency discriminator. The frequency error can be also reduced by introducing the proposed frequency discriminator to modify the frequency error detection performance. The acquisition time of the proposed AFC circuit can be reduced by about 100 symbols compared to the conventional cross-product type AFC circuit.},
keywords={},
doi={},
ISSN={},
month={January},}
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TY - JOUR
TI - A New AFC Circuit Employing Double-Product Type Frequency Discriminator in Very-Low CNR Environments
T2 - IEICE TRANSACTIONS on Communications
SP - 25
EP - 32
AU - Nobuaki MOCHIZUKI
AU - Takatoshi SUGIYAMA
AU - Masahiro UMEHIRA
PY - 1997
DO -
JO - IEICE TRANSACTIONS on Communications
SN -
VL - E80-B
IS - 1
JA - IEICE TRANSACTIONS on Communications
Y1 - January 1997
AB - This paper proposes a new AFC (automatic frequency control) circuit employing a double-product type frequency discriminator to enable fast acquisition in very-low CNR (carrier to noise power ratio) environments. The frequency step responses of the proposed AFC circuit are theoretically analyzed. In addition this paper evaluates the performance of the proposed AFC circuit by computer simulation in very-low CNR environments. The simulation results confirm that click noise at the frequency discriminator causes large frequency tracking error and that this error can be improved by increasing the delay time of the double-product type frequency discriminator. The frequency error can be also reduced by introducing the proposed frequency discriminator to modify the frequency error detection performance. The acquisition time of the proposed AFC circuit can be reduced by about 100 symbols compared to the conventional cross-product type AFC circuit.
ER -
English
