Simulative Analysis of Influence of Modulation Techniques on COFDM based Radio over Fiber Transmission | Zendy

Shikha Mahajan | Zendy; Naresh Kumar | Zendy

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Simulative Analysis of Influence of Modulation Techniques on COFDM based Radio over Fiber Transmission

Author(s) -

Shikha Mahajan,

Naresh Kumar

Publication year - 2012

Publication title -

international journal of modern education and computer science

Language(s) - English

Resource type - Journals

eISSN - 2075-017X

pISSN - 2075-0161

DOI - 10.5815/ijmecs.2012.08.01

Subject(s) - computer science , orthogonal frequency division multiplexing , modulation (music) , transmission (telecommunications) , radio over fiber , telecommunications , electronic engineering , computer network , channel (broadcasting) , acoustics , physics , engineering

In this paper, Coded Orthogonal Frequency Division Multiplexing (COFDM) based Radio over Fiber (RoF) system is simulated (for different bit rates) for different modulation techniques to observe impact on system parameter (quality factor (Q)). Influence of increasing bit rates has been observed for 2 km long linear multimode fiber. To reduce dispersion due to multimode fiber, convolutional encoder (code rate ½, generator polynomial 1338, 1718) and viterbi hard decision decoding algorithm are chosen for simulative model of COFDM based RoF system. Transmission of 32 sub-carriers with externally modulated continuous wave laser source gave satisfied results for Q values.

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