Summary: IEEE COMMUNICATIONS LETTERS, VOL. 11, NO. 7, JULY 2007 589
Outage Probability of Selection Cooperation in the
Low to Medium SNR Regime
Elzbieta Beres and Raviraj Adve
Abstract-- Selection has been shown to be an effective and
practical method of implementing cooperative diversity. However,
the available analysis has largely focused on diversity order
and the asymptotically high signal to noise ratio (SNR) regimes.
We approximate the outage probability of selection cooperation
for all SNR levels and arbitrary channel distributions. The
approximations are significantly better than the available high-
SNR approximations for practical values of outage probability.
Index Terms-- Outage probability, cooperative diversity, selec-
SELECTION cooperation, recently proposed in , , has
been shown to be an attractive alternative to cooperative
diversity schemes based on maximum ratio combining (MRC).
By selecting only one cooperative partner, selection coop-
eration avoids the known problem of bandwidth expansion