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Power compensation study to optical communication on improved control model with time-delay

D. ZHAO1,* , J. ZHANG1, Y. QU1, D. AO2, Y. ZHAO1

Affiliation

  1. Key Laboratory of Information Photonic and Optical Communications, Ministry of Education Beijing University of Posts and Telecommunications, Beijing 100876, China
  2. Department of Electronic Information and Control Engineering, Beijing University of Technology

Abstract

This paper mainly presents the self-tuning PID controller based on improved BP neural network for a networked control system (NCS) with the presence of network transmission time-delay and power compensation at amplifiers’ node firstly. In this study, the function of the standard control plane of the automatically switched optical network is enhanced to perceive transmission impairments and control tunable physical impairment compensators in the physical layer. A link level power control model is introduced to the dynamic adjustment for learning rate and adjusts the OSNR value of the signals toward channel OSNR optimization. Control algorithms continuously update their channel powers in response to dynamic information from the network links. And the controller could achieve the on-line adaptive power compensation without changing the parameters of PID controller. The results of simulation show that the proposed new PID controller is better to adjust channel power independently at the transmitter sites and achieve channel optical signal-to-noise ratio (OSNR) optimization with network time-delays.

Keywords

OSNR, PID control, BP neural network, power impairment, time-delay, optical links.

Submitted at: March 3, 2011
Accepted at: March 16, 2011

Citation

D. ZHAO, J. ZHANG, Y. QU, D. AO, Y. ZHAO, Power compensation study to optical communication on improved control model with time-delay, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 3, pp. 200-205 (2011)