CORRELATOR DEVELOPMENT FOR SIMULTANEOUS DETERMINATION OF DISTANCE AND SPEED OF TARGETS ON S-BAND RADAR RECEIVER

• Main Author: Tamaza, Diaz
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/74726
• Institution: Institut Teknologi Bandung

Radar (radio detection and ranging) is an important component in the air defense system used to monitor the country from enemy threats. To carry out monitoring in the air surveillance radar is used. In addition, surveillance radar also functions to detect targets and direct fighter aircraft to defend against detected threats. Surveillance radar that aims to guide or direct fighter aircraft to intercept and attack detected targets is the GCI (ground-controlled interception) radar. These targets can be fighter aircraft and UAV (unmanned aerial vehicle). The detected target must be determined by its distance and speed. Therefore, a radar system is needed that can determine distance and speed simultaneously with the aim of being able to identify targets in real time. In this research, range Doppler processor algorithm is developed. This algorithm uses correlation processing consisting of pulse compression operations and FFT (Fast fourier transform). The Doppler processor output range is very influential on the bandwidth, the number of FFT bins, and number of PRI used. In addition, the period is also a determinant for the maximum range of the target. Therefore, it is important to achieve or find a balance between the parameters and the desired results. Based on simulation, the suggested design produces a distance NMSE (Normalized mean squared error) of 1.627x10-10 and a Doppler NMSE of 1.14x10-5 with a standard deviation value of 0 and Doppler close to 0 with system iterations of 100 times. To validate the design algorithm, an experiment with a random target was carried out. From these experiments, the distance NMSE values were 1.407x10-10 and the Doppler NMSE values were 4.26x10-3. Based on the NMSE values obtained, it is concluded that the designed radar system produces accurate distances and speeds. The designed system was tested with USRP B210. From the test results, it was found that the difference between the distance and target speed was small between the range Doppler processor results and the target simulator, which was below 1%.