Speed Detection of Ground Moving Vehicles using GSM based Passive Radar

Passive radar is essentially, a receiver-only radar that usually dissociates the receiving antenna at a different location from the transmitter. One existing radio transmission system suitable for passive radar operation is the Global System for Mobile communication (GSM). Range resolution is determ

Project Title

Speed Detection of Ground Moving Vehicles using GSM based Passive Radar

Project Area of Specialization

Shared Economy

Project Summary

Passive radar is essentially, a receiver-only radar that usually dissociates the receiving antenna at a different location from the transmitter. One existing radio transmission system suitable for passive radar operation is the Global System for Mobile communication (GSM). Range resolution is determined by the bandwidth of the GSM signal and frequency resolution is determined by the total duration for the coherent processing; both properties are independent of each other. Thus, given the small bandwidth of a GSM carrier signal (81.3 kHz), it is therefore insufficient to provide an acceptable range resolution. However, by increasing the coherent integration time (CIT), a GSM signal can achieve good Doppler resolution, making the GSM-based passive radar very suitable for moving target indication applications.

Project Objectives

The main objectives of the project is to make a passive radar that could be used to calculate the dopplar shift and cross corelation of moving bodies which further would be used to calculate the speed of moving objects like moving automobile .

Project Implementation Method

The project is implemented by using two directional antennas and a USRP and a processing unit mainly laptop. One antenna takes the direct signals from the GSM tower while the other antenna takes the reflected back signals from the moving objects. After that signal processing is done to find out the velocities of the moving objects from which reflected signals were gathered in the first place.

Benefits of the Project

The major benefits of the project are that it is very cheap and good alternative for a traffic monitoring unit. Further this is the first time someone has done reseach on passive radars in Pakistan. So this research would further open doors to future researches related to passive radar and its implementation for different purposes.

Technical Details of Final Deliverable

The pasive radars uses two directional antennas to collect GSM signals that have been reflected by the stationary and as well as the moving bodies. Those signals could be used to calculate the speed and distance of such objects while doing signal processing. The signal processing is done through USRP which is connected to both antennas and as well as to the processing unit which is mainly a CPU. After that GNU Radio which runs of LINX software is used to futher process the signals so that reliable results can be generated.

Final Deliverable of the Project

Hardware System

Type of Industry

Transportation

Technologies

Others

Sustainable Development Goals

Decent Work and Economic Growth

Required Resources

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