Ana Belen Martinez

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— Channel state information at transmitters is important for advanced transmission schemes. However, feedback and transmission control delays of multiple milliseconds in LTE systems result in severe outdating of this information at vehicular velocities. Channel prediction based on extrapolation of the short-term fading is inadequate in LTE systems at(More)
—The performance of wireless data transmission to mobile vehicles is improved if channel state information is available at the transmitter but movement of vehicles causes outdating of channel estimates. The concept of a predictor antenna has recently been proposed, where an antenna is placed in front of other antennas on the roof of the vehicle to sense the(More)
I. EXTENDED ABSTRACT The traffic explosion in mobile internet puts new challenges on future mobile access networks. Forecasts predict more than 50 billion connected devices and a required thousand-fold increase in network capacity. Such future wireless access networks will enable the intelligent society in which humans and devices can be connected anywhere(More)
Dummy Page. This thesis is based on the following papers, which are referred to in the text by their Roman numerals. III Rikke Apelfröjd and Mikael Sternad, " Robust linear precoder for coordinated multipoint joint transmission under limited backhaul with imperfect CSI, " Analysis and measurement of multiple antenna systems for fading channel prediction in(More)
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