  We investigate the effect of imperfect feedback on the \epsilon-outage
capacity of incremental relaying in the low signal-to-noise ratio (SNR) regime.
We show that imperfect feedback leads to a rescaling of the pre-log factor
(comparable to the multiplexing gain for networks operating in the high SNR
regime) and thus reduces the \epsilon-outage capacity considerably. Moreover,
we investigate the effect of different degrees of feedback reliability on the
system performance. We further derive a simple binary tree-based construction
rule to analyze networks with an arbitrary number of relay nodes with respect
to imperfect feedback. This rule can directly be mapped to a comprehensive
matrix notation.
