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Comparing LQG/LTR and the SDRE Techniques for Hybrid Fully-Connected PLL Network Control

[+] Author Affiliations
Átila Madureira Bueno

São Paulo State University, Sorocaba, SP, Brazil

Angelo Marcelo Tusset

Fed. Tech. University of Paraná, Ponta Grossa, PR, Brazil

Diego Paolo Ferruzzo Correa, José Roberto Castilho Piqueira

University of São Paulo, SP, Brazil

José Manoel Balthazar

São Paulo State University, Rio Claro, SP, Brazil

Paper No. DETC2013-12649, pp. V008T13A030; 7 pages
  • ASME 2013 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 8: 22nd Reliability, Stress Analysis, and Failure Prevention Conference; 25th Conference on Mechanical Vibration and Noise
  • Portland, Oregon, USA, August 4–7, 2013
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5599-7
  • Copyright © 2013 by ASME


Synchronization plays an important role in telecommunication systems and integrated circuits. The Master-Slave is a commonly used strategy for clock signal distribution. However, due to the wireless networks development and the higher operation frequency of integrated circuits, the Mutually-Connected clock distribution strategies are becoming important, and the Fully-Connected strategy appears as a convenient engineering solution. The main drawback of the Fully-Connected architecture is the definition of control algorithms that assure the stability of the network sinchronization. In hybrid synchronization techniques groups of nodes synchronized by the Fully-Connected architecture are synchronized with network master clocks by using the Master-Slave tecnique. In this arrangement, if a route of clock signal distribution becomes inoperative, the group of Fully-Connected nodes retain for some time the original phase and frequency received from the network. The Fully-Connected architecture complexity imposes difficulties to satisfy both stability and performance requirements in the control system design. For that reason the multi-variable LQG/LTR and the SDRE control techniques are applied in order to fulfill both stability and performance requirements. The performance of both techniques are compared, and the results seems to confirm the improvement in the transient response and in the precision of the clock distribution process.

Copyright © 2013 by ASME



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