Analisis unjuk kerja sistem ofdm-rof 10 gbps dengan mapping 4-qam menggunakan sistem dithering

Nurul, Haiziah Nugraha (2018) Analisis unjuk kerja sistem ofdm-rof 10 gbps dengan mapping 4-qam menggunakan sistem dithering. Undergraduate Thesis thesis, Institut Teknologi Telkom Purwokerto.

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Abstract

Radio over Fiber is a hybrid technology that combines the technology of optical fiber with radio waves, with a very high access speed. For the concept of mobile broadband modulation for optical and wireless to connect i.e. wear on (Orthogonal Frequency Division Modulation). The performance of the system depends on RoF optical modulator, modulation and bit rate used power level lasers and fiber optic channels, RF, power level non liniear optical. Dithering overcome non-linear effects of optical seraat fiber optic, in there is some type of nonlinear systems this dithering can cope with nonlinear type of SBS formed by light scattering in an optical fiber, and to lower the frequency of the radio signal is modulated, and increasing amplitude linearity of the system. On this research will be conducted on system design-RoF using mapping 4-QAM, the variations of power input-8 dBm,-6 dBm,-4 dBm,-2 dBm, 0 dBm, 2 4 dBm, dBm 6 dBm, and 8 dBm, fiber length variation and 10 Km, 50 Km, 100 Km and based on the results of testing that te is done system use dithering can increase power received on sisireceiver so it makes a better signal quality, the influence of the input power (dBm) on CW Laser greatly affects the signal spectrum, a constellation of signals, and also the power received at the receiver. Systems using dithering showed good results, at the power input on the CW laser is great, but given the small input power is experiencing a shift phase motors. Keywords: Radio over Fiber(RoF), OFDM, Dithering, Nonlinear.

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