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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:
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MIMO scheme
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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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