Santosa, Anak Agung Ngurah Arymurti (2019) Analisa Penggunaan Sumber Cahaya Putih LED Dikromatik Pada Sistem Komunikasi Cahaya Tampak OOK-NRZ. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem komunikasi cahaya tampak merupakan salah satu solusi dengan potensi terbaik untuk menghadapi era komunikasi 5G dan keperluan bandwidth yang terus meningkat setiap tahun. Sistem komunikasi cahaya tampak pada umumnya memanfaatkan lampu LED putih dengan lapisan fosfor, tetapi LED ini memiliki efek keterlambatan dari lapisan fosfor yang membatasi bandwidth komunikasi sistem. Solusi yang digunakan untuk LED putih fosfor saat ini adalah dengan menggunakan 3 komponen LED (Trikromatik RGB) atau filter optik biru yang cukup mahal. Pada tugas akhir ini 2 komponen LED (dikromatik) digunakan sebagai alternatif dalam mengatasi permasalahan tipe LED sebelumnya. Telah didapatkan nilai CRI, CCT, dan chromaticity untuk LED Dikromatis Lime-Red yaitu CRI 81,8, CCT 2747K, dan nilai chromaticity (0,4928;0,4771) untuk CIE 1931 (x;y) dan (0,2547;0,5548) untuk CIE 1976 (u^';v^'). Kemudian kombinasi LED dikromatik Lime-Blue dengan CRI 76,4, CCT 72322K, dan nilai chromaticity (0,1903;0,3967) untuk CIE 1931 (x;y) dan (0,1903;0,3967) untuk CIE 1976 (u^';v^'). Serta telah didapatkan laju data untuk setiap LED dan kombinasi LED dengan BER 1.10^(-9) pada red modulated RGB (0,62 Mbps), lime modulated red (0,94 Mbps), lime modulated blue (0,96 Mbps), lime (0,98 Mbps), blue modulated RGB (1,02 Mbps), cool white phosphor (1,09 Mbps), green modulated RGB (1,11 Mbps), green (1,15 Mbps), blue modulated lime (1,28 Mbps), red modulated lime (1,31 Mbps), blue (1,34 Mbps), dan red (1,39 Mbps). LED dikromatik Lime-Red dan Lime-Blue memiliki laju data mendekati operasi LED Merah/Biru tunggal sehingga dapat digunakan sebagai alternatif LED putih fosfor. LED dikromatis Lime-Red dan Lime-Blue juga lebih ekonomis dibandingkan dengan LED Trikromatik RGB standar berdasarkan jumlah LED yang digunakan. =============================================================================================================================
Visible light communication is regarded as one of the highest potential solution to solving the problems that arise from 5G communication and the bandwidth bottleneck that keeps rising each year. Quality of a communication system can be quantified by the data rate, and BER (Bit Error Rate). Other than the communication system, visible light communication also plays a role in lighting infrastructure and so a good LED lamp with a good lighting characteristic such as its CRI is used. White LED lamp with phosphor layer is the most common choice in a visible light communication system, but this type of LED has a slowing effect caused by its phosphor layer which reduces its communication bandwidth and so 3 LED components that is Trichromatic RGB is used as an alternative. In this final project, 2 LED components (dichromatic) is used as another solution to solve previous LED type problems. CRI, CCT, and chromaticity for Dichromatic LED Lime-Red are obtained as follows, CRI 81,8; CCT 2747K, and chromaticity (0,4928;0,4771) for CIR 1931 (x,y) and (0,2547;0,5548) for CIE 1976 (u^';v^'). And then for Lime-Blue Dichromatic LED Combination is obtained as follows, CRI 76,4, CCT 72322K, and chromaticity (0,1903;0,3967) for CIE 1931 (x;y) and (0,1903;0,3967) for CIE 1976 (u^';v^'). Maximum data rates for every LED and LED combination with the lowest BER (1.〖10〗^(-9)) is also obtained for red modulated RGB (0,62 Mbps), lime modulated red (0,94 Mbps), lime modulated blue (0,96 Mbps), lime (0,98 Mbps), blue modulated RGB (1,02 Mbps), cool white phosphor (1,09 Mbps), green modulated RGB (1,11 Mbps), green (1,15 Mbps), blue modulated lime (1,28 Mbps), red modulated lime (1,31 Mbps),blue (1,34 Mbps), and red (1,39 Mbps). Lime-Red and Lime-Blue Dichromatic LED have a data rate comparable to a single Red/Blue LED, which then can be used as an alternative to a single Phosphorous White LED. Lime-Red and Lime-Blue Dichromatic LED also has an economic advantage compared to standard RGB Trichromatic LED based on the number of LED used.
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