Analisa kinerja teknik modulasi digital pada kanal optik nirkabel / performance analysis of digital modulation techniques on wireless optical channel

Astharini, Dwi and Mayola, Ary and Samijayani, Octarina Nur and Syahriar, Ary (2017) Analisa kinerja teknik modulasi digital pada kanal optik nirkabel / performance analysis of digital modulation techniques on wireless optical channel. Jurnal Elektronika dan Telekomunikasi, 17 (1). pp. 7-12. ISSN 2527-9955

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Abstract

Free space optical transmission with its data speed has many potential in close range especially indoor communication. This paper compared the performance of FSO transmission on a number of modulation schemes. The observations are mainly made by comparing the bit error rate result for each scheme. Atmospheric turbulence and noise are introduced to the transmission channel in the form of log normal model on simulation. The basic modulations simulated are on-off keying as the classical techniue for FSO, and its spatial variation, the pulse position modulation. Exploring the baseband modulations for optic application, also implemented are the PSK of 2, 4, 8, 16, and QAM of 4 and 16. Simulation with short data-length resulted that BPSK dan 4-QAM gave best performance among all, with average BER of 10 in medium to high turbulence condition. While the error level of OOK and PPM are 10 at best.

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