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M. Rupp, M. Lerch:
"The Performance of 3G and 4G cellular systems";
Talk: cocoon seminar series, Darmstadt, Deutschland (invited); 07-04-2012.

This contribution provides insight into the performance of
the currently deployed 3G cellular systems HSDPA and WiMAX. In extensive
measurement campaigns we measured the physical layer throughput of these
3G systems in different environments (alpine and urban) and compare the
results rigorously to their upper bounds derived from the well known
Shannon capacity. By separating the observed losses into a channel state
information loss, a design loss, and an implementation loss, we gain
more insight into the performance of the different standards which in
turn allows us to compare them better and to localize their
shortcomings. In general, we find that implementations of the current
standards still operate about 10 dB away from the Shannon bound.
We finally consider 4G LTE systems with up to eight antennas and find that
they are not considerably better with respect to bandwidth efficieny.

This contribution provides insight into the performance of
the currently deployed 3G cellular systems HSDPA and WiMAX. In extensive
measurement campaigns we measured the physical layer throughput of these
3G systems in different environments (alpine and urban) and compare the
results rigorously to their upper bounds derived from the well known
Shannon capacity. By separating the observed losses into a channel state
information loss, a design loss, and an implementation loss, we gain
more insight into the performance of the different standards which in
turn allows us to compare them better and to localize their
shortcomings. In general, we find that implementations of the current
standards still operate about 10 dB away from the Shannon bound.
We finally consider 4G LTE systems with up to eight antennas and find that
they are not considerably better with respect to bandwidth efficieny.

4G wireless systems

http://publik.tuwien.ac.at/files/PubDat_208674.pdf

Project Head Christoph Mecklenbräuker:
Christian Doppler Lab "Funktechnologien für nachhaltige Mobilität"