Purwono, Adi (2017) Perancangan Radar HF Berbasis FPGA Untuk Pengamatan Karakteristik Ionosfer. Masters thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Radar HF (High Frequency) adalah instrumen yang digunakan untuk mengamati dinamika lapisan ionosfer yang memancarkan sinyal secara vertikal untuk mengetahui kualitas sistim komunikasi jarak jauh dengan radio HF. Dengan wilayah Indonesia yang luas diperlukan instrumen Radar HF yang tersebar dari wilayah timur sampai barat Indonesia, namun jumlah Radar HF yang beroperasi sekarang sangat minim sehingga identifikasi kualitas komunikasi radio HF di Indonesia sangat terbatas, agar pengamatan kualitas sistim komunikasi HF dapat dilakukan lebih baik, diperlukan desain Radar HF sebagai prototipe Radar operasional. Perancangan Radar HF untuk prototipe Radar pengamatan karakteristik ionosfer dengan menggunakan metode bi-phase coded pulse compression yaitu, Barker coded-pulse untuk meningkatkan nilai sensitifitas instrumen, selanjutnya implementasi sistem dengan modul FPGA (Field Programmable Gate Array) diterapkan untuk meningkatkan performansi sistem secara keseluruhan. Hasil perancangan digunakan untuk mengamati karakteristik lapisan ionosfer saat sore dan malam hari di lokasi uji kota Sumedang, Jawa Barat. Radar HF hasil perancangan memberikan informasi pembentukan lapisan E ionosfer di ketinggian 101-112 km pada sore hari pada rentang frekuensi yang dipantulkan dari 3 MHz sampai 5 MHz. Pada malam hari Radar dapat mengkonfirmasi lapisan E yang terdeformasi, dan lapisan F yang naik di ketinggian sampai 554 km dengan rentang frekuensi yang dipantulkan dari 6 MHz sampai 10 MHz. ========================================================================================================================
HF (High Frequency) Radar is used for observing ionosphere layer, where it transmits electromagnetic signal vertically in order to obtain information the quality of HF radio communication link. Indonesia’s large geographical area needs more HF Radar instruments that spread from east to west of Indonesian archipelago, however the instrumentations instaled are far from enough, such that the prediction of the quality of HF communication link can not be well established, then it is a need to design as a prototype of operational HF Radar. In this research, the bi-phase coded pulse compression e.g. Barker coded-pulse implemented on FPGA processor. Furthermore, the Radar design implemented using FPGA is investigated and applied in order to improve the overall performance. The designed Radar is used to measure the ionosphere layer over Sumedang area, West Java during the after noon time and night time. The observation of ionosphere dynamics gave the results that the Radar can detect the presence of E layer over Sumedang at height 101 – 112 km where it reflected the signal from 3 MHz to 5 MHz during after noon time. During night time the designed Radar confirms the deformation of E layer as well as detects the presence of F layer at height 554 km where the F layer reflected the signal from 6 MHz to 10 MHz.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | : Radar, FPGA, Radio, HF |
| Subjects: | T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5101 Telecommunication T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5102.5 Modulation (Electronics), Demodulation (Electronics) |
| Divisions: | Faculty of Industrial Technology > Electrical Engineering > 20101-(S2) Master Thesis |
| Depositing User: | Purwono Adi |
| Date Deposited: | 28 Aug 2017 03:16 |
| Last Modified: | 05 Mar 2019 06:41 |
| URI: | http://repository.its.ac.id/id/eprint/43040 |
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