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Non-WSSUS vehicular channel characterization in highway and urban scenarios at 5.2 GHz using the local scattering function

Författare:
  • Alexander Paier
  • Thomas Zemen
  • Laura Bernado
  • Gerald Matz
  • Johan Kåredal
  • Nicolai Czink
  • Charlotte Dumard
  • Fredrik Tufvesson
  • Andreas Molisch
  • Christoph Mecklenbräuker
Publiceringsår: 2008
Språk: Engelska
Sidor: 9-15
Dokumenttyp: Konferensbidrag

Sammanfattning

The fading process in high speed vehicular traffic telematic

applications at 5 GHz is expected to fulfill the wide-sense

stationarity uncorrelated scattering (WSSUS) assumption for

very short time-intervals only. In order to test this assumption

we apply the concept of a local time– and frequency–variant

scattering function, which we estimate from measurements

of vehicle-to-vehicle wave propagation channels by means

of a multi-window spectrogram. The obtained temporal sequence

of local scattering functions (LSF) is used to calculate

a collinearity measure. We define the stationarity time

as the support of the region where the collinearity exceeds a

certain threshold. The stationarity time is the maximum time

duration over which the WSSUS assumption is valid. Measurements

from an highway with vehicles driving in opposite

directions show stationarity times as small as 23 ms whereas

vehicles driving in the same direction show stationarity times

of 1479 ms.

Nyckelord

  • Electrical Engineering, Electronic Engineering, Information Engineering

Övriga

International Workshop on Smart Antennas (WSA)
Published
  • Radio Systems-lup-obsolete

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