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Application
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Future multimedia applications, e.g.
mobile TV or mobile internet, will require much higher data rates than
today's. The capacity of traditional communication systems are by far
not sufficient for that. Multi-antenna techniques are seen as key
technology to achieve the required data rates for the next generation
of the air interfaces WiFi,
WiMAX,
and 3GPP-LTE, because of the
spatial
dimension complementing time (TDM), frequency (FDM), and code (CDM)
multiple access technologies.
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Wave Propagation for MIMO Applications
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MIMO channel
capacity grows linearly with the number of antenna pairs as long as the
environment has sufficiently rich scatterers. Thus highly accurate wave
propagation models are
required to evaluate the MIMO channel parameters
in complex propagation scenarios.
The radio network planning
tool WinProp includes ray-optical wave propagation
models
which process 3D vector data of buildings
in order to determine the
mobile radio channel within various environments (rural,
urban, indoor, and tunnels).
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For the consideration of MIMO antenna
arrays the tool allows
the prediction of the radio channel in time, frequency, and spatial
domains between each pair of the Tx and Rx antenna elements.
Furthermore the ray tracing model was extended to consider vertical and
horizontal polarization which influences the transmission, reflection
and diffraction coefficients (e.g. according to Fresnel coefficients
and geometrical/uniform theory of diffraction (GTD/UTD)).
Read more about the wave propagation
results
related to MIMO.
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Modeling
of MIMO Channels
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Challenges for MIMO channel
modeling:
AWE Communications provides a post-processing tool which
is able to model MIMO antenna arrays at both sides of the radio link in
order to obtain a full description of the MIMO channel.
Read more about the post-processing of
wave
propagation results.
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MIMO scheme
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