Desain Radar CC-OFDM-MIMO untuk Radar Hujan

Syahrir, Mohammad Chaezar (2026) Desain Radar CC-OFDM-MIMO untuk Radar Hujan. Other thesis, Institut Teknologi Sepuluh Nopember.

Text 5048221037-Undergraduate_Thesis.pdf - Accepted Version Restricted to Repository staff only Download (2MB) | Request a copy

Abstract

Desain radar hujan berbasis CC-OFDM-MIMO (Circulating Code–Orthogonal Frequency Division Multiplexing-Multiple Input Multiple Output) dikembangkan untuk meningkatkan efisiensi daya, resolusi jarak, dan akurasi deteksi intensitas hujan melalui analisis sinyal pantulan (backscatter) secara digital. Sistem beroperasi pada frekuensi 5.5 GHz dengan bandwidth 60 MHz dan konfigurasi MIMO menggunakan single polarization. Sinyal pancaran dibangkitkan melalui metode CC-OFDM, diolah melalui pemodelan kanal pantulan hujan, dan dikembalikan dalam bentuk data reflektivitas (Z) serta intensitas hujan (R). Estimasi hubungan antara Z dan R dihitung menggunakan model empiris Z = 200R¹·⁶, menghasilkan representasi distribusi curah hujan berdasarkan pantulan radar. Hasil simulasi menunjukkan bahwa sistem berhasil menghasilkan beam dengan HPBW 0,960° dan SLL teramati −26,57 dB, mendeteksi sel hujan pada (R = 20,60 km, θ = 0°) dengan reflektivitas puncak 44,35 dBZ dan intensitas puncak 21,55 mm/jam. Berdasarkan klasifikasi BMKG, intensitas hasil estimasi berada pada kategori hujan sangat lebat, konsisten dengan kategori truth. RMSE reflektivitas konstan pada kisaran 5,32-5,33 dBZ untuk variasi SNR 0-35 dB. Resolusi jarak yang dicapai adalah 25 m pada window simulasi 50 km.
======================================================================================================================================
A CC-OFDM-MIMO (Circulating Code-Orthogonal Frequency Division Multiplexing-Multiple Input Multiple Output) rainfall radar system is designed to enhance power efficiency, range resolution, and rainfall intensity detection through digital backscatter signal analysis. The system operates at 5.5 GHz with a 60 MHz bandwidth and configuration using single polarization. The transmitted signal is generated using the CC-OFDM method, processed through a rain backscatter channel model, and reconstructed as reflectivity (Z) and rainfall rate (R) data. The empirical relationship Z = 200R¹·⁶ is applied to estimate rain intensity distribution from radar echoes. Simulation results show that the system successfully generates beams with an HPBW of 0.960° and an observed SLL of −26.57 dB, and detects the rain cell at (R = 20.60 km, θ = 0°) with a peak reflectivity of 44.35 dBZ and a peak rainfall intensity of 21.55 mm/h. According to the BMKG classification, the estimated rainfall intensity falls into the very heavy rain category, consistent with the truth category. The reflectivity RMSE remains constant at around 5.32-5.33 dBZ across an SNR variation of 0-35 dB. The achieved range resolution is 25 m within a 50 km simulation window.

Item Type:	Thesis (Other)
Uncontrolled Keywords:	Radar Hujan, Circulating Code, OFDM, Radar MIMO, Backscatter, Intensitas Hujan, Marshall-Palmer. Rainfall Radar, Circulating Code, OFDM, MIMO Radar, Backscatter, Rainfall Intensity, Marshall-Palmer.
Subjects:	T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5102.9 Signal processing. T Technology > TK Electrical engineering. Electronics Nuclear engineering > TK5103.484 Orthogonal frequency division multiplexing. 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 Intelligent Electrical and Informatics Technology (ELECTICS) > Telecommunication Engineering > 20202-(S1) Undergraduate Thesis
Depositing User:	Mohammad Chaezar Syahrir
Date Deposited:	28 Jul 2026 02:26
Last Modified:	28 Jul 2026 02:26
URI:	http://repository.its.ac.id/id/eprint/137736

Actions (login required)

View Item