An Improved Timing Recovery Algorithm Design

Abstract:

Timing-jitter is an important index of timing recovery algorithm. This paper describes impact-factors of timing-jitter in an AWGN channel and discovers that input noise have great influence on it, proposed an improved timing recovery method for adding a loop gain to reduce it. Simulations demonstrate that a timing recovery with loop gain can have performance superior to that of without it, and got the conclusion that add loop gain at the range of 0.1 to 0.3 both timing jitter and timing recovery points can reach minimum values. Better yet, when choose a loop gain at 0.1, timing jitter decrease from ±0.2 to ±0.08, and system’s error rates also have obverse decrease.

• Periodical: Applied Mechanics and Materials (Volumes 130-134)
• Pages: 2997-3000
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.130-134.2997
• Online since: October 2011
• Authors: Jia Mei Feng, Yuan Cheng Yao, Ming Wei Qin
• Keywords: Error Rate, Loop Gain, Timing Recovery, Timing-Jitter

References

[1] Lars Erup, Floyd M. Gardner: Interpolation in Digital modems-part II : implementation and performance. IEEE Transactions on Communications, Vol. 41(1993), pp.998-1008.

DOI: 10.1109/26.231921

[2] Floyd M. Gardner: Interpolation in Digital modems-part I : fundaments. IEEE Transactions on Communications Vol. 41(1993), pp.501-507.

DOI: 10.1109/26.221081

[3] Floyd M. Gardner: A BPSK/QPSK timing detector for sampled receivers. IEEE Transactions on Communications Vol. 34(1986), pp.423-429.

DOI: 10.1109/tcom.1986.1096561

[4] Li Qian: The research and realization on timing recovery technique of QAM demodulator. Xidian University(2006).

[5] Kong Ming-Dong, qiu kun: Design method for digital profiler to reduced timing-jitter. Journal of UEST of chinaVol. 31(2002), p.557–561.