 
Summary: Upperbound for the Pairwise Error Probability
of S pacetim e C odes in Physical C hannel
S cenarios
T harak a A . L am ahewa, R odney A . K ennedy and T hushara D . A bhayapala
Abstract In this paper, we derive an upperbound for
the pairwise error probability of spac etim e c odes whic h
c aptures the effec ts of the transm itter and the rec eiver
antenna c onfi g urations (antenna separation and antenna
g eom etry ) and the surrounding sc attering distributions at
the transm itter and the rec eiver antenna array s. T his
new upperbound allows investig ation of the individual
effec ts of antenna c onfi g uration and sc attering environm ent
param eters on the perform anc e of spac etim e c odes. U sing
this upperbound, we q uantify the deg ree of the effec t of
antenna c onfi g uration on the diversity advantag e g iven by
a spac etim e c ode. S im ulation results show that as the
num ber of antennas inc rease within a fi x ed aperture, the
diversity advantag e of a spac etim e c ode is upperlim ited
by the siz e of the antenna aperture.
In d e x T e rm s C hernoff upperbound, m odal c orrelation,
