M.I. Naryshkin - Deputy Commander of Military Unit (Moscow) E-mail: nmi@rambler.ru

One of the main requirements for the considered RoF transmission system for organizing mobile radio communication in general, along with the need to ensure satisfactory data transmission quality when the length of the optical line tract of 50 km or more, is to maximize the reduction of costs, including using leased optical fibers. This makes the need for organizing RoF duplex signal over a single optical fiber. However, increasing the length of the optical link will require prima tion of additional measures to compensate for chromatic dispersion. In addition, as no less important is the fight against the distortions that are associated with polarization effects, Rayleigh and Brillouin scattering of optical radiation in the fiber, resulting, in turn, to the emergence of reverse flow. Significant levels of backflow would lead to a decrease in signal to noise ratio and consequently, an increase in error rate, ie will result in a decrease in the quality of communication. The article contains quantitative estimates of the channel quality parameters, as well as graphs of expression attenuation parameters and the optical signal / noise ratio of the length of the optical path. Also, shown in detail the construction of a mathematical model duplex signaling in a mobile radio communication networks based RoF technology that takes into account the interaction of the incoherent optical laser transmitter system. As a result of simulation duplex transmission mode numerical results obtained, namely the eye diagram, Q factors and probability of error for different lengths of optical line. Based on the results of calculation it found that the inclusion of the attenuator is almost completely suppresses the link between the lasers in the organization of two-way transmission signals on the basis of RoF networks over a single fiber.

 

1. Listvin A.V., Listvin V.N., SHvyrkov D.V. Opticheskie volokna dlja linijj svjazi. M.: LESAR art. 2003. 288 c.
2. Bottacchi S. Multi-Gigabit transmission over multimode optical fibre: theory and design methods for 10GbE systems. Wiley. 2006. 653 p.
3. Dzhonson G., Grehkhem M. Vysokoskorostnaja peredacha cifrovykh dannykh. Vysshijj kurs chernojj magii. M.: Izdatelskijj dom «Viljams». 2005. 1024 s.
4. Van Deventer M.O. Fundamentals of bidirectional transmission over a single optical fibre. Eindhoven: Technische Universiteit Eindhoven. 1994. 408 p.
5. Lang R., Kobayashi K. External optical feedback effects on semiconductor injection laser propierties // IEEE Journal of Quantum Electron. 1980. QE-16. P. 347−355.
6. Pieroux D., Mandel P. Bifurcation diagram of a complex delay-differential equation with cubic nonlinearity // Phys. Rev. 2003. E‑67. V. 67. № 5. P. 056213‑1−056213‑7.
7. Annovazzi-Lodi V., Donati S., Manna M. Chaos and locking in a semiconductor laser due to external injection // IEEE Journal of Quantum Electronics. 1994. V. 30. № 7. P. 1537−1541.
8. Rontani D., Locquet A., Sciamanna M., Citrin D.S. Spectrally efficient multiplexing of chaotic light // Opt. Lett. 2010. V. 35. P. 2016−2018.
9. Grigorieva E.V., Kashchenko S.A., Loiko N.A., Samson A.M. Nonlinear dynamics in a laser with a negative delayed feedback // Physica D: Nonlinear Phenomena. 1992. V. 59. № 4. P. 297−319.
10. Le Nguyen Binh. Optical Fiber Communications Systems: Theory and Practice with MATLAB and Simulink Models. CRC Press. 2010. 560 p.
11. Korjukin I.V. Identichnaja khaoticheskaja sinkhronizacija nekogerentno svjazannykh poluprovodnikovykh lazerov i dvunapravlennaja peredacha informacii // Izvestija VUZov. PND. 2010. № 3. S. 60−69.
12. Vicente R., Mirasso C.R., Fischer I. Simultaneous bidirectional message transmission in a chaos-based communication scheme: erratum // Opt. Lett. 2007. V. 32. P. 1271−1271.
13. Javaloyes J., Mandel P., Pieroux D. Dynamical properties of lasers coupled face to face // Phys. Rev. E-67. 2003. 036201. P. 11.