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http://dx.doi.org/10.7840/kics.2013.38A.7.545

A Timing Recovery Scheme for Variable Symbol Rate Digital M-ary QASK Receiver  

Baek, Daesung (숭실대학교 정보통신전자 공학부 무선통신시스템연구실)
Lim, Wongyu (한국 항공우주연구원)
Kim, Chong-Hoon (숭실대학교 정보통신전자 공학부 무선통신시스템연구실)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.38A, no.7, 2013 , pp. 545-551 More about this Journal
Abstract
Timing recovery loop composed of the Timing Error Detector(TED), loop filter and resampler is widely used for the timing synchronization in MQASK receivers. Since TED is sensitive to the delay between the symbol period of the signal and sampling period, the output is averaged out when the symbol rate and sampling rate are quite different the recovery loop cannot work at all. This paper presents a sampling frequency discriminator (SRD), which detects the frequency offset of the sampling clock to the symbol clock of the MQASK data transmitted. Employing the SRD, the closed loop timing recovery scheme performs the frequency-aided timing acquisition and achieve the synchronization at extremely high sampling frequency offset, which can be used in variable symbol rate MQASK receivers.
Keywords
MQASK; Timing Recovery Loop; Symbol Rate Discriminator; Timing Error Detector; Resampler;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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1 F. M. Gardner, "Interpolation in digital modems part I: fundamentals," IEEE Trans. Commun., vol. 41, no. 3, pp. 501-507, Mar. 1993.   DOI   ScienceOn
2 U. Mengali and A. N. D'Andrea, Synchronization Techniques for Digital Receivers, Plenum Press, 1997.
3 K. H. Mueller and M. Muller, "Timing recovery in digital synchronous data receivers," IEEE Trans. Commun., vol. 24, no. 5, pp. 516-531, May 1976.   DOI
4 F. M. Gardner, "A BPSK/QPSK timing -error detector for sampled receivers," IEEE Trans. Commun., vol. 34, no. 5, pp. 423-429, May 1986.   DOI
5 Y. T. Chan, B. H. Lee, R. Inkol, and F. Chan, "Estimation of symbol rate from the autocorrelation function," in Proc. Canadian Conf. Elect. Comput. Eng. (CCECE '09), pp. 547-550, St. John's, U.S.A., May 2009.
6 C. Mosquera, S. Scalise, and R. Lopez-Valcarce, "Non-data-aided symbol rate estimation of linearly modulated signals," IEEE Trans. Signal Process., vol. 56, no. 2, pp. 664-674, Feb. 2008.   DOI   ScienceOn
7 X. Jin-yong, Z. Yu, and J. Hui-juan, "Symbol rate estimation based on Wavelet transform," in Proc. 2012 8th Int. Conf. Wireless Commun. Networking Mobile Comput. (WiCOM), pp. 1-4, Shanghai, China, Sep. 2012.
8 F. J. Harris and M. Rice, "Multirate digital filters for symbol timing synchronization in software defined radios," IEEE J. Sel. Areas Commun., vol. 19, no. 12, pp. 2346-2357, Dec. 2001.   DOI   ScienceOn
9 K.-N. Seo and C.-H. Kim, "The optimization of timing recovery loop for an MQASK all digital receivers," J. KICS, vol. 35, no. 1, pp. 40-44, Jan. 2010.   과학기술학회마을