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A Frequency Offset Compensation Technique for the High Order QAM using a Phase Differential Equation  

박상열 (충북대학교 정보통신공학과)
윤태일 (충북대학교 정보통신공학과)
조경록 (충북대학교 정보통신공학과)
Publication Information
Journal of the Institute of Electronics Engineers of Korea TC / v.41, no.10, 2004 , pp. 27-33 More about this Journal
Abstract
In this paper, we present a carrier recovery circuit using the polarity-decision algorithm that recovers a phase and a frequency error simultaneously. The proposed algorithm catches a frequency error based on a differential of an angular velocity of the signal constellations. Using the differential of a phase error may compensate the frequency error. The symbol prediction method in the proposed algorithm accumulates the symbols, which makes easy to calculate a phase differential. The hardware size of the algerian is small since we use Q data or I only to get phase information. As a result, the algerian shows a pull-in range of normalized frequency error 0.5 under AWGN 15dB.
Keywords
위상오차;주파수오차;반송파복원;극성결정알고리즘 QAM;
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1 Marco Luise, Ruggero Reggiannini, 'Carrier Frequency Recovery in All-Digital Modems for Burst-Mode Transmissions,'IEEE Trans. Commun., vol. 43,pp.1169-1178, April 1995   DOI   ScienceOn
2 Robert L. C., Richard D. G., 'Adaptive Carrier Recovery System for Digital Data Communications Receivers' IEEE Journal. Commun., vol. 7, No.9, December 1989
3 Young-Ok Park, Jee-Hwan Ahn, 'A New Carrier Recovery Method for 16-QAM signal' IEEE 1997
4 Ki Hyunk Park, Dae Kyo Shin, 'A QPSK/16QAM Receiver Chip for LMDS Application' IEEE 2000
5 Satoshi Denno, Yoichi Saito, 'Recursive least squares estimation for QAM and QPSK signals in the presence of frequency offset' IEEE 1992
6 H. Sari and S. Moridi, 'New phase and frequency detectors for carrier recovery in PSK and QAM systems,' IEEE Trans. Commun., vol. 36, pp. 1035-1043, Sept. 1988   DOI   ScienceOn
7 K. Yamanaka et al., 'A multilevel QAM demodulator VLSI with wideband carrier recovery and dual equalizing mode,' IEEE Journal of Solid-state Circuits, vol. 32, no. 7, pp. 1101-1107, July 1997   DOI   ScienceOn
8 Kim K. Y., Choi H. J., ' Design of Carrier Recovery Algorithm for High-Order QAM with Large Frequency Acquisition Range' IEEE 2001
9 Yuan Ouyang, Chin-Liang Wang, 'A New Carrier Recovery Loop for High-Order Quadrature Amplitude Modulation' IEEE 2002