Human detection with and without weapon using LTE-based passive Forward Scattering Radar System

Abstract Firstly, radar is a system that has a radio transmitter that transmits radio waves, which will be received by a receiver, and it is used for detecting and locating objects. The passive radar system only receives signal from existing transmitters such as telecommunication antenna by using radio signal for tracking, detecting and so on. This experimental study was conducted with a human holding a weapon representing intruders that cross borders illegally into the country. Existing commercial telecommunication antenna was used as the transmitter transmitting the electromagnetic waves, and the system received the waves by using the receiver antenna. There are many techniques for a passive radar but in this case, we used the forward scattering region to detect human with and without weapon. The Doppler signature from human detection is produced when the receiver antenna detects any presence of a human that passes through between the transmitter and receiver. Two LTE frequencies used in this experimental work were 1.8 GHz and 2.63 GHz with several providers and have wider LTE coverage. The data from human detection was collected using LTE based passive forward scattering radar system, and was then analysed using Matlab programme. Principal Component Analysis (PCA) was used to classify the human without weapon and human holding a weapon into two categories. This system successfully classified the human with and without weapon and could be used by the military for border protection.