Characterisation of MIMO Propagation Channel in Multi-link Scenarios

Helsinki University of Technology Abstract of the Master’s Thesis Author: Jukka Koivunen Name of the Thesis: Characterisation of MIMO Propagation Channel in Multilink Scenarios Date: December 10, 2007 Number of Pages: 67 Department: Department of Electrical and Communications Engineering Professorship: S-26 Radio Engineering Supervisor: Professor Pertti Vainikainen Instructor: M.Sc. Veli-Matti Kolmonen In this master’s thesis a measurement system for dynamic wideband double directional multi-link MIMO propagation measurements at 5.3 GHz was developed. The system is able to measure two 32x32 MIMO channels simultaneously with maximum doppler frequency of 11.73 Hz. Two measurement campaigns using this system were conducted, and measurement data from the campaigns were analyzed to verify the correct operation of the system. The literal part of the work begun with a literature review on existing MIMO channel models and MIMO channel sounding measurements. In this survey it was seen that no dynamic MIMO multi-link measurements have been performed previously. Also the basics of the MIMO systems and MIMO propagation channel measurement technigues were studied. The possible configurations for measuring the multi-link MIMO channel were considered and a system based on two existing channel sounding equipment was presented. The interoperability of the sounders was made possible with some system modifications done to the TKK sounder. Finally it was shown that the measurement system is able to produce impulse responses of MIMO propagation channel in multi-link scenarios, and so the measurement system can be used for simultaneous measurements of dynamic multi-link MIMO channels and the data of the measurement campaigns conducted as a part of this thesis can be used for analyzing this kind of channels.