Positioning in LTE Sytems

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Dr. Imre Sándor
Department of Networked Systems and Services

The first step of my work was literature research. I became familiar the basics and innovations of the new generation mobile system called LTE. I studied the Orthogonal Frequency-division Multiplexing method and comprehended its operation. I mentioned the highly accurate but not always available GPS technology. I also researched positioning methods based on mobile networks. I examined which ones are used in LTE, how they work and how accurate results are they capable of providing.

In the second phase of the project I worked together with two of my colleagues. We had to create our own framework which we could use to implement different positioning methods, perform measurements and compare results.

Our goal was to find an existing simulator which is compliant with LTE standards and accurate enough for further work. Creating our own complex system would have been too big a challenge and we would not be able to guarantee high enough accuracy, which was crucial for us. We looked at several options but after a more thorough examination they all turned out to be too inaccurate, and this would have had a too great an impact on our results. Finally the WINNER companys WINNER II channel model proved to be adequate in every respect. We used this as the core of our MATLAB based modular framework.

After this was done I implemented my time based positioning method and performed my measurements as well. The results were quite promising.


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