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"Sistem Wireless Avionics Intra-Communications (WAIC) adalah suatu teknologi masa depan untuk sistem komunikasi pada pesawat yang akan menggantikan sistem komunikasi kabel menjadi sistem komunikasi nirkabel (wireless). Sistem WAIC tidak menyediakan komunikasi antara udara dengan darat, udara dengan udara, dan udara dengan satelit. Kandidat pita frekuensi kerja yang paling kompatibel dengan sistem WAIC adalah 4200-4400 MHz dan 22-23 GHz. Skripsi ini telah memodelkan dan mensimulasikan interferensi antara sistem WAIC dengan fixed service pada pita frekuensi 22-23 GHz. Parameter yang disimulasikan pada skripsi ini adalah frekuensi, daya transmitter, gain, bandwidth, feeder loss, atenuasi oleh gas, dan batas kriteria interferensi. Simulasi yang telah dilakukan pada skripsi ini adalah untuk mengetahui jarak proteksi agar sistem WAIC dan fixed service tidak terganggu. Batas wilayah interferensi antara sistem WAIC denga fixed service belum pernah dilakukan simulasi atau analisis di berbagai penelitian sebelumnya. Hasil simulasi pada skripsi diperoleh bahwa agar sistem WAIC terhindar dari interferensi sistem fixed service, maka pesawat tidak boleh lebih dekat 1,45 km dari main-lobe dan 230 meter dari side-lobe yang pertama fixed service, sedangkan ketinggian maksimum pesawat ketika sistem WAIC terjadi interferensi adalah 30 meter relatif terhadap antena fixed service. Batas wilayah interferensi dilakukan penelitian untuk memudahkan pilot pesawat penerbangan sipil untuk tidak melewati batas wilayah interferensi tersebut.

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Wireless Avionics Intra-Communication (WAIC) is the standard of future avionics communications systems, which will substitute wired-communication in a single aircraft. The WAIC systems do not provide any communication between air-to-ground, air-to-air, and air-to-satellite. The WAIC systems are designed for enhancing the efficiency and reliability communications systems of the aircraft. The purposes of the systems are monitoring, controlling, and communicating the parts of the aircraft, such as landing gear, wings, nacelles, vertical stabilizer, engine, etc.

This paper simulate and analyze the interference between WAIC and Fixed Service systems at 22-23 GHz. There are two scenarios interference between these systems. Each scenarios are found the protection distance. The first is maximum protection distance between aircraft and Fixed Service is 1.45 km to protect the WAIC from the interference of the Fixed Service systems. The second is to protect the Fixed Service systems, the separation distance and the airport do not be able to less than 45 km. This paper have analyzed that the 22-23 GHz band is suitable to support the development standard to WAIC systems. Also the WAIC systems is compatible with the Fixed Service systems in that frequency band."

"[Tesis ini membuat model kompatibilitas atau frequency sharing antara Unmanned Aircraft System (UAS) dan Fixed Service (FS). UAS adalah sistem pesawat tanpa awak yang terdiri dari pengendali dan wahana udara yang dikendalikan. UAS memiliki kondisi BLOS dan LOS. FS adalah sistem komunikasi terrestrial antar dua titik di permukaan Bumi. Kompatibilitas antara FS dan UAS dimodelkan dengan interferensi antara dua sistem tersebut. Skenario interferensi tersebut diamati ketika UAV (Unmanned Aerial Vehicle) atau UA (Unmanned Aircraft), wahana udara yang dikendalikan, berada dalam kondisi BLOS dan terbang diantara sistem FS. Skenario interferensi ini terdapat dua macam, yaitu interferensi dari UAV ke FS dan interferensi dari FS ke UAV. Kompatibilitas antara FS dan UAS yang direpresentasikan oleh UAV dibutuhkan untuk mendukung operasi BLOS. BLOS (Beyond Line of Sight) diperlukan karena sinyal dari UACS (Stasiun Pengendali Pesawat tanpa Awak) memiliki keterbatasan dalam kondisi LOS (Line of Sight). Keputusan akhir dalam penetapan pita frekuensi untuk UAS ditentukan pada WRC-15 di tahun 2015. Spektrum BLOS direncanakan dengan memanfaatkan pita frekuensi dari FSS (Fixed Satellite Service). Hal ini berarti bahwa UAS akan menggunakan satelit sebagai sarana sistem kendali dalam kondisi BLOS. Masalah utama dari penyebaran UA (Unmanned Aircraft) atau UAV (Unmanned Aerial Vehicle) adalah kompatibilitas dengan sistem yang incumbent. Alokasi spektrum FSS di region 3 ITU (Asia dan Oceania) berada di pita frekuensi 12,2- 12,5 GHz. Frekuensi ini terbagi dengan sistem FS (Fixed Service). Simulasi dilakukan untuk menyelidiki interferensi dari emisi pengirim FS ke penerima UAV. Hasil simulasi menunjukkan bahwa interferensi dari FS ke UAV dan sebaliknya (vice versa) tidak melewati batas (threshold). Implikasinya frekuensi 12,2-12,5 GHz aman digunakan untuk UAV.;This thesis creates the compatibility model or frequency sharing between Unmanned Aircraft System (UAS) and Fixed Service (FS). UAS is a unmanned aerial vehicle system that consists of the control station and the controlled vehicle (UAV or UA). UAS has BLOS and LOS condition. FS is the terrestrial communication system between two points or more on the earth surface. The compatibility between FS and UAS is modeled by the interference between those two systems. The interference path is observed when the UAV (Unmanned Aircraft Vehicle), the controlled vehicle, has been in BLOS condition and flies above the FS tower. The interference scenario in this thesis has two conditions, the interference from UAV to FS and the interference from FS to UAV. The Compatibility of FS and UAS (represented by UAV) is required to support BLOS (Beyond Line of Sight). The BLOS condition is required since the signal is often bounded in LOS condition. The final decision in the establishment of UAS frequency band is determined in WRC (World Radiocommunication Conferece)-15 in 2015. The BLOS spectrum is planned to use FSS (Fixed Satellite Service) frequency band. The main problem of the unmanned aircraft (UA) or unmanned aerial vehicle (UAV) deployment is the compatibility with the incumbent system. The allocation of FSS spectrum in the region 3 (Asia and Oceania Region) is in the band 12.2- 12.5 GHz. This frequency band is shared with the frequency of FS (Fixed Service). The simulation is conducted to investigate the interference from the FS emission into the UAV receiver. The results of simulation present that the interference from the FS to UAV and vice versa will be harmless as it does not exceed specific threshold. This suggests that the 12,2-12,5 GHz frequency band is safe for UAS Application, This thesis creates the compatibility model or frequency sharing between Unmanned Aircraft System (UAS) and Fixed Service (FS). UAS is a unmanned aerial vehicle system that consists of the control station and the controlled vehicle (UAV or UA). UAS has BLOS and LOS condition. FS is the terrestrial communication system between two points or more on the earth surface. The compatibility between FS and UAS is modeled by the interference between those two systems. The interference path is observed when the UAV (Unmanned Aircraft Vehicle), the controlled vehicle, has been in BLOS condition and flies above the FS tower. The interference scenario in this thesis has two conditions, the interference from UAV to FS and the interference from FS to UAV. The Compatibility of FS and UAS (represented by UAV) is required to support BLOS (Beyond Line of Sight). The BLOS condition is required since the signal is often bounded in LOS condition. The final decision in the establishment of UAS frequency band is determined in WRC (World Radiocommunication Conferece)-15 in 2015. The BLOS spectrum is planned to use FSS (Fixed Satellite Service) frequency band. The main problem of the unmanned aircraft (UA) or unmanned aerial vehicle (UAV) deployment is the compatibility with the incumbent system. The allocation of FSS spectrum in the region 3 (Asia and Oceania Region) is in the band 12.2- 12.5 GHz. This frequency band is shared with the frequency of FS (Fixed Service). The simulation is conducted to investigate the interference from the FS emission into the UAV receiver. The results of simulation present that the interference from the FS to UAV and vice versa will be harmless as it does not exceed specific threshold. This suggests that the 12,2-12,5 GHz frequency band is safe for UAS Application]"