Darmawan, Nabilah Saarah (2019) Modem Sistem Komunikasi Frekuensi Tinggi Near Vertical Incidence Skywave (NVIS) Menggunakan Perangkat USRP. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Sistem komunikasi yang memanfaatkan frekuensi tinggi ini dapat dimanfaatkan untuk jarak jauh karena menggunakan pantulan ionosfer dengan menggunakan metode Near Vertical Incidence Skywave pengembangan sistem komunikasi pada saat ini masih terbatas pada pengiriman suara, namun seiring dengan berkembangnya zaman komunikasi saat ini menginginkan informasi data yang dapat berupa data teks. Mempunyai keuntungan yang murah dibandingkan sistem komunikasi lain contohnya sistem komunikasi satelit. Sistem komunikasi frekuensi tinggi ini menggunakan perangkat USRP N210 yang di produksi oleh National Instrument, alat ini di program melalui LabVIEW. Modulasi dan Demodulasi memegang peranan yang penting, tujuannya mentransform sinyal agar sesuai dengan keadaan di medium transmisi sehingga menghasilkan kualitas yang baik, untuk mengetahui hal tersebut melakukan pengukuran dengan menggunakan parameter FER, CER, dan BER. Dengan menggunakan tipe pulse shaping root raised cosine dengan roll of factor 0.5 pada saat symbol rate 200k didapatkan hasil berturut turut FER, CER, BER rata rata berikut pada 200 karakter sebesar 0.7 , 0.0035 , 0.000438 , untuk 500 karakter didapatkan hasil 0.85 , 0.0048 , 0.0006 adapun untuk 1000 karakter didapatkan 0.65 , 0.0087 , 0.00269 2000 karakter didapatkan hasil 0.875 , 0.005 , 0.000625. Pada saat symbol rate 10k, 200 karakter didapatkan hasil FER, CER, BER berturut turut 1, 0.663 , 0.2724. 500 karakter didapatkan 1 , 0.7258 , 0.2808 adapun 1000 karakter didapatkan 1 , 0.734 , 0.1952 dan 2000 karakter mendapatkan hasil 1 , 0.7667 , 0.1952.
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Communication system that using high frequency can be used for long distance because it using ionospheric reflection with Near Vertical Incidence Skywave Method. Nowadays, communication system still limited in voice transmission, but along the way now we try to develop system using text message to transfer the information. This communicaton system has an advantage such as cheap infrastructure other than communication. This communication system uses USRP devices produced by National Instrument, this device is programmed through LabVIEW. Modulation and Demodulation play an important role in this communication system, the goal is to transform signal to suit the condition in the medium so it has good quality, to find out this it measured using FER,CER,BER parameters by using root raised cosine with roll of factor 0.5. when symbol rate 200k is obtained FER, CER, and BER in 200 characters in the following results are 0.7, 0.0035, 0.000438 . in 500 characters are 0.85 , 0.0048 , 0.006 then in 1000 characters it was obtained 0.65, 0.0087 , 0.00269 and 200o characters the results are 0.875, 0.005 , 0.000625. When the symbol rate 10k in 200 characters are obtained 1 , 0.663, 0.274 as 500 characters got 1 , 0.07258 , 0.2808 while 1000 characters are obtained 1 , 0.734 , 0.1952 and 2000 characters got 1, 0.7667 , 0.1952.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.384 11 Dar m-1 2019 |
| Uncontrolled Keywords: | Frekuensi Tinggi, Modulasi, Demodulasi |
| Subjects: | Q Science > QC Physics > QC973.4.T76 Tropospheric radio waves Including absorption, propagation, etc. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.2 Wireless communication systems. Two way wireless communication |
| Divisions: | Faculty of Electrical Technology > Electrical Engineering > 20201-(S1) Undergraduate Thesis |
| Depositing User: | Darmawan Nabilah Saarah |
| Date Deposited: | 09 May 2023 01:21 |
| Last Modified: | 09 May 2023 01:21 |
| URI: | http://repository.its.ac.id/id/eprint/63857 |
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