Modeling of Indoor Radio Channel

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Modeling of Indoor Radio Channel

• Weerachai Anotaipaiboon
• Professor Bob Brodersen
• Dept. of EECS
• University of California, Berkeley

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Modeling of Indoor Radio Channel

• A well characterized multipath medium is useful
  in designing the transmitter and receiver that
  can reduce the effect of multipath fading
• A simple statistical multipath model of the
  indoor radio channel that fits the measurements
  well is presented
• Future work modeling of time-variant indoor
  radio channel

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Baseband Impulse Response
Where
The parameters can be treated as time-invariant
random variables since the variation rates are
very slow compared to any useful signaling rate
that are likely to be considered.
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Magnitude Impulse Response
Typical Impulse Response
h(t,?)
t
Impulse Response Model
t
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Parameter Models
Tl is exponentially distributed with parameter ?
?kl is exponentially distributed with parameter ?
?l, ?kl ? Uniform(0,2?)
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Parameter Models (Continue)
is exponentially distributed which implies that
is Rayleigh
distributed.
Baseband impulse response model
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Summary

• With this model, the received signal rays arrive
  in clusters
• The rays have uniform phases, and independent
  Rayleigh amplitudes with variances that decay
  exponentially with cluster and ray delays
• The clusters and the rays within each cluster
  form Poisson arrival processes with different,
  but fixed, rates

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Summary (continue)

• The clusters are formed by the building
  superstructure, while the individual rays are
  formed by objects in the vicinities of the
  transmitter and the receiver

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Future Work

• Analysis of the indoor propagation channels
  temporal variation
• Model the channel as a linear time-varying filter