A Novel Frequency Locked Loop Based on Stochastic Resonance

DOI

10.2991/isccca.2013.98How to use a DOI?

Keywords

stochastic resonance,carrier tracking,frequency-locked loop,low signal-to-noise ratio

Abstract

Frequency locked loop (FLL) plays an important role in carrier synchronization because of its excellent dynamic performance. However, it performs inadequately in low signal-to-noise ratio (SNR). In this paper, the principle of stochastic resonance (SR) is briefly introduced and a SR processor is proposed. Based on traditional FLL, the SR processor is added before frequency discriminator in order to weaken the effect that thermal noise brings to FLL. The paper investigates the processing effect of SR. Simulation results show that the performance of improved FLL is greatly improved. It can tolerate rather high dynamics and tracking accuracy of frequency achieve 0.2Hz even with CNR as low as 25 dBHz, which verified the validity of above ideas.

Copyright

© 2013, the Authors. Published by Atlantis Press.

Open Access

This is an open access article distributed under the CC BY-NC license (http://creativecommons.org/licenses/by-nc/4.0/).

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TY  - CONF
AU  - Weitong Zhang
AU  - Zhiqiang Li
AU  - Wenming Zhu
PY  - 2013/02
DA  - 2013/02
TI  - A Novel Frequency Locked Loop Based on Stochastic Resonance
BT  - Proceedings of the 2nd International Symposium on Computer, Communication, Control and Automation (ISCCCA 2013)
PB  - Atlantis Press
SP  - 399
EP  - 402
SN  - 1951-6851
UR  - https://doi.org/10.2991/isccca.2013.98
DO  - 10.2991/isccca.2013.98
ID  - Zhang2013/02
ER  -