  In the coming years, third-generation detectors such as Einstein Telescope
and Cosmic Explorer will enter the network of ground-based gravitational-wave
detectors. Their current design predicts a significantly improved sensitivity
band with a lower minimum frequency than existing detectors. This, combined
with the increased arm length, leads to two major effects: the detection of
more signals and the detection of longer signals. Both will result in a large
number of overlapping signals.
  It has been shown that such overlapping signals can lead to biases in the
recovered parameters, which would adversely affect the science extracted from
the observed binary merger signals. In this work, we analyze overlapping binary
black hole coalescences with two methods to analyze multi-signal observations:
\textit{hierarchical subtraction} and \textit{joint parameter estimation}. We
find that these methods enable a reliable parameter extraction in most cases
and that joint parameter estimation is usually more precise but comes with
higher computational costs.
