A zero-crossing digital phase-locked loop architecture with hyperbolic nonlinearity for high Doppler environments

Ehab Salahat, Mahmoud Al-Qutayri, Saleh R. Al-Araji, Hani Saleh

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

7 Scopus citations

Abstract

This paper presents a new Zero-Crossing Digital Phase-Locked Loop (ZC-DPLL) for frequency synchronization and tracking. The proposed hyperbolic Σ-Δ based ZC-DPLL has an improved time jitter by a factor of 6.4 and an extended lock-in range by a factor of sinh(π)/π. These significant improvements were achieved by introducing a hyperbolic nonlinearity and a modified Σ-Δ blocks to the original ZC-DPLL architecture. These intentionally added system blocks adapt the loop filter and hence result in extending the loop locking range and improving its time jitter. The proposed hyperbolic ZC-DPLL performs well in wireless communication systems with high Doppler shift that may cause the system to lose lock. The extensive simulation results of the new architecture under various conditions show the robustness of the new architecture in terms of lock-in range, acquisition time, and jitter.

Original languageBritish English
Title of host publication2014 21st IEEE International Conference on Electronics, Circuits and Systems, ICECS 2014
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages56-59
Number of pages4
ISBN (Electronic)9781479942428
DOIs
StatePublished - 25 Feb 2015
Event2014 21st IEEE International Conference on Electronics, Circuits and Systems, ICECS 2014 - Marseille, France
Duration: 7 Dec 201410 Dec 2014

Publication series

Name2014 21st IEEE International Conference on Electronics, Circuits and Systems, ICECS 2014

Conference

Conference2014 21st IEEE International Conference on Electronics, Circuits and Systems, ICECS 2014
Country/TerritoryFrance
CityMarseille
Period7/12/1410/12/14

Keywords

  • Frequency Synchronization
  • Lock-in Range
  • Raised-Cosine
  • Sigma-Delta
  • Time Jitter
  • ZC-DPLL

Fingerprint

Dive into the research topics of 'A zero-crossing digital phase-locked loop architecture with hyperbolic nonlinearity for high Doppler environments'. Together they form a unique fingerprint.

Cite this