This paper describes the development of radar object detection using two dimensional constant false alarm rate (2D-CFAR). Objective of this development is to minimize noise detection if compared with the previous algorithm that uses one dimensional constant false alarm rate
AbstrakRadar penembus dinding memiliki potensi untuk dapat digunakan dalam penanganan pasca bencana dan gangguan keamanan.Tulisan ini membahas hasil perancangan dan pembuatan sistem Radar Penembus Dinding Ultra Wide Band Frequency Modulated Continous Wave (UWB-FMCW) yang digunakan untuk mendeteksi keberadaan suatu objek di balik dinding. Dalam penelitian ini dikembangkan pembangkit chirp UWB menggunakan kombinasi DDS dan VCO sebagai komponen utama pembangkit gelombang FMCW untuk mendapatkan linearitas yang tinggi, merealisasikan tranceiver dalam arsitektur homodyne, mengembangkan modul akuisisi, serta merealisasikan perangkat lunak untuk melakukan pengolahan sinyal dan menampilkannya dalam bentuk citra secara real time menggunakan MS Visual C++. Sistem radar penembus dinding didesain untuk memiliki resolusi 6 cm dan jarak tidak ambigu 30 m, pada rentang pita frekuensi kerja 500 -3000 MHz. Dari hasil pengujian dalam skala laboratorium radar ini mampu melakukan identifikasi objek dibalik dinding yang terbuat dari kayu setebal 3 cm pada jarak 4 m dan menampilkannya dalam bentuk citra A-Scan dan B-Scan secara real time.Kata kunci: radar, penembus dinding, pembangkit chirp UWB, akuisisi data berkecepatan tinggi, deteksi objek, FMCW.
AbstractThe through-wall radar has the potential to be used in post-disaster and security disturbances. This study aims to design and realize the through wall radar system based on Ultra Wide Band and Frequency Modulated Continuous Wave (FMCW-UWB) technology to detect an object behind the wall. In this study, we develop an UWB Chirp using DDS and VCO as a main component to obtain FM linearity, realizing transceiver in homodyne architecture, develop a data acquisition module using USB interface, as well as the realization of the software to perform signal processing and displays the image in real time in the form of using MS Visual C++. The through wall radar system is designed to have a resolution of 6 cm and unambiguous distance of 30 m, in the range of working frequency band 500-3000MHz. Based on the laboratory test result, the designed radar is able to identify objects behind 3cm thick wood walls at a distance of 4m and displays the image in the form of A-Scan and B-Scan in real time.
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