SIMULATION OF A TEMPORAL HARD-LIMITED OCDMA SYSTEM OVER FSO LINK UNDER AVERAGE TURBULENCE

Authors

  • Vítor Gouvêa Andrezo Carneiro
  • Gilberto Kirk Rodrigues
  • Maria Thereza M. Rocco Giraldi

Keywords:

Optical Code Division Multiple Access (OCDMA), Free Space Optics (FSO), Hard-Limiter, Optical Orthogonal Codes

Abstract

In this paper, the feasibility and performance of a complete Optical Code Division Multiple Access system over Free Space Optics link under weak atmospheric turbulence is demonstrated through simulation. The system is proposed for multiple users sharing a single optical wireless channel to transmit coded information. It can be an initial step in mobile optical networks with multiple addressable nodes and multidirectional receivers. Usual optical sequences, such as Prime Codes, are used. The effects of variable number of users and different code lengths are considered in terms of Bit Error Rate, which is evaluated for different channel distances and divergence angles. The effects of extinction ratio in modulators, transmitter laser linewidth and carrier phase shift in delay lines are taken into account. It is shown that these effects impose a precise control of power in the hard-limiter stage.

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Published

2013-08-01

How to Cite

Vítor Gouvêa Andrezo Carneiro, Gilberto Kirk Rodrigues, & Maria Thereza M. Rocco Giraldi. (2013). SIMULATION OF A TEMPORAL HARD-LIMITED OCDMA SYSTEM OVER FSO LINK UNDER AVERAGE TURBULENCE. Journal of Microwaves, Optoelectronics and Electromagnetic Applications (JMOe), 12, si79-si95. Retrieved from http://www.jmoe.org/index.php/jmoe/article/view/390