Luhur, Irawan Budiadi (2019) Sinkronisasi Gelombang Pembawa untuk Sistem Komunikasi HF Berbasis USRP. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Kinerja sistem komunikasi HF pada frekuensi 3-30 MHz akan berkurang dengan berbagai parameter, seperti adanya noise yang mengganggu, panjang lintasan propagasi, dan variasi kanal terhadap waktu. Sistem komunikasi HF memanfaatkan ionosfer sebagai lintasan propagasi gelombang radio, sehingga dapat menyebabkan terjadinya kesalahan pendeteksian gelombang pembawa, seperti pergeseran atau perubahan informasi pada sisi penerima. Hal ini terjadi karena adanya efek multipath dan doppler yang menyebabkan terjadinya pergeseran frekuensi dan fasa saat proses transmisi. Dengan memanfaatkan Phase-Locked Loop (PLL) yang merupakan pusat dari metode sinkronisasi gelombang pembawa, pergeseran frekuensi dan fasa saat proses transmisi dapat dikompensasi. Oleh karena itu, pada penelitian tugas akhir ini, dilakukan perancangan desain PLL pada sistem komunikasi HF menggunakan perangkat keras USRP N210 melalui perangkat lunak LabVIEW. Dengan daya pancar ± 7 Watt, modulasi BPSK, dan beberapa parameter lainnya, telah berhasil diuji untuk komunikasi menggunakan antena dipol untuk pemancar dan penerima yang berjarak ± 35 meter. Dari hasil pengujian sebanyak 25 kali, sistem PLL menghasilkan waktu dengan rata-rata 14,2.
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Performance of the HF communication system at 3-30 MHz frequency will be reduced with various parameters, such as the presence of disturbing noise, the length of the propagation path, and channel variation towards time. HF communication system utilizes the ionosphere as a radio wave propagation path, so it can cause an error at carrier wave detection, such as a shift or change in information on the receiving side. It happens because of the multipath and doppler effects which cause a frequency and phase shift during the transmission process. By utilizing Phase-Locked Loop (PLL) which is the center of the carrier wave synchronizing method, frequency and phase shift can be compensated. Therefore, in this final project, design of the PLL have been done on the for HF communication system using USRP N210 through LabVIEW software. With ± 7 Watt transmit power, BPSK modulation, and other parameters, it has been successfully tested for communication using dipole antennas on the transmitter and receiver within ± 35 meter. From the results of test 25 times, PLL system produces a time with an average of 14,2
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RSE 621.384 11 Luh s-1 2019 |
| Uncontrolled Keywords: | Sinkronisasi Gelombang Pembawa, PLL, HF, LabVIEW, USRP |
| 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: | Luhur Irawan Budiadi |
| Date Deposited: | 08 May 2023 00:55 |
| Last Modified: | 08 May 2023 00:55 |
| URI: | http://repository.its.ac.id/id/eprint/63855 |
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