Abstract
To combat the signal-degrading effects of multipath propagation in a DECT system, diversity techniques can be employed. The performance of a switched antenna diversity scheme based on received power is analyzed and compared with the performance of selection diversity for a frequency non-selective radio channel with either Rayleigh or Rician fading characteristics. Received output power statistics are chosen as performance measure. Expressions are derived for the performance of two-branch switched diversity with unequal branch statistics, antenna (space) correlation and (partial) time correlation between succeeding time samples. Results show that switched diversity performance is always inferior to selection diversity performance and that the Rice factor influences the diversity gain non-linearly. Both diversity schemes are sensitive to unequal branch statistics, while switched diversity gain deteriorates fastest. Antenna correlation does not have a large influence on the performance of switched diversity. Finally, it is also shown that the diversity gain with switched diversity is reduced considerably if there is only partial time correlation between succeeding time samples.
Published Version
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