Signal Processing Technique for Pulse Modulation (PM) Ground Penetrating Radar (GPR) System Based on Phase and Envelope Detector Technique

Ground Penetrating Radar (GPR) system is a system used to detect and locate underground embedded objects which are based on the principles of RADAR. This system use reflection of electromagnetic wave technique, which will be generated towards the ground and detected back using antenna. This paper focuses on the analysis of signal processing of Pulse Modulation (PM) GPR system based on phase and envelope detector (ED) technique to detect and estimate the depth of embedded object in 3 dimension model of GPR system simulation designed using CST Studio Suite software. The antenna used in the simulation model is a Dipole antenna which operates at 70 MHz until 80 MHz. The background model used is a rectangular object with dry sandy soil material while the embedded object chosen is a rectangular iron object. Based on the output signal calculated by the CST software, the signal will be exported to be processed using MATLAB to produce GPR radargram. The simulation results show that by applying the proposed signal processing technique based on phase of GPR output signal, the embedded object can be seen clearly and estimated at about 900 and 1000 mm depth. By using ED technique all the embedded object can be detected but hard to be estimated on its depth.