MIMO TerminalsThe use of mobile radio communications is increasing rapidly. Traditional systems are being replaced by wireless systems, while more and more applications require mobility. The growing dependence on mobile communication systems increases the demand for high transmission speeds and reliable communication.
One possible solution is to use multiple antennas, on both the transmission and the reception sides. At the same time, hand-held units are being given more and more functions, such as cameras, memory cards etc., together with their associated antennas, in an already limited space. New methods therefore need to be developed in order to improve the process of integrating antennas.
In principle, modern tools for electromagnetic field simulations enable antenna performance to be calculated with good accuracy. However, their drawback is that they are time-consuming. With the introduction of new methods such as MIMO and diversity, it is therefore clear that more time-efficient numerical methods should be used.
The purpose of this project is to develop methods for efficient development and testing of new antenna solutions and systems for mobile units. The solution consists of using data from electromagnetic simulations as input data for the circuit simulation software, allowing the antenna performance and coupling between ports to be efficiently calculated for various load cases. These methods make it possible to optimise and test different system arrangements without having to repeat the time-consuming electromagnetic simulations. As the process uses ordinary circuit simulation software, there are essentially no limitations on what can be connected to the antenna ports. Both passive and active elements can be used, and the technique can also be used for evaluating different types of signal processing, such as diversity or MIMO systems. The project's industrial partners are building demonstrator equipment on which measurements can be made, and analyses run, in order to test and verify the methods that have been developed.
The MIMO Terminals project is part of the Chase VINN Excellence Centre at Chalmers.
Project participants are:
- SP Technical Research Institute of Sweden (Project management)
- Chalmers University of Technology
- Sony Ericsson