Irma, Susanti Situmorang (2017) Analisis unjuk kerja pada modulasi digital dengan modulasi optis eksternal dengan deteksi koheren pada sistem baseband over fiber. Undergraduate Thesis thesis, Institut Teknologi Telkom Purwokerto.
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Abstract
RoF technology is an engineering system that can transmit microwave waves through optical fiber for long distance using Orthogonal Frequency Division Multiplexing (OFDM) multiplexing technique) OFDM-RoF system will be very related to modulation and demodulation mechanism in both transmitter and receiver side, it is influenced by several parameters The mechanism of mapping modulation, the mechanism of up-conversion E / O (optical modulator, fiber characteristics, and down-conversion O / E (optical to electrical conversion). This study will focus on digital modulation performance of 4 QAM, 16 QAM, QPSK, 8-PSK and 16 QAM using external optical modulation with coherent detection on baseband over fiber using Software optisystem 14.1. With variations in fiber length from 10 km to 50 km for receiving power, constellation and signal spectrum. In the results of this study both on the receiving power of the spectrum form, the most well-modulated signal constellation 16 QAM with the amplitude value in the signal constellation 8909 a.u, and the power subsystem at 98 dBm. Then it can be concluded the higher the modulation then the received power is high, and the longer the distance traveled in the lower power. Keywords: RoF, OFDM, M-QAM and M-PSK
| Item Type: | Thesis (Undergraduate Thesis) |
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| Subjects: | T Technology > T Technology (General) |
| Divisions: | Faculty of Telecommunication and Electrical Engineering > Telecommunication Engineering |
| Depositing User: | staff repository 1 |
| Date Deposited: | 28 Dec 2017 05:53 |
| Last Modified: | 22 Apr 2021 06:44 |
| URI: | http://repository.ittelkom-pwt.ac.id/id/eprint/85 |
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