The Fundamental Multi-Baseline Mode-Mixing Foreground in 21 cm EoR
  Observations
  The primary challenge for experiments measuring the neutral hydrogen power
spectrum from the Epoch of Reionization (EoR) are mode-mixing effects where
foregrounds from very bright astrophysical sources interact with the instrument
to contaminate the EoR signal. In this paper we identify a new type of
mode-mixing that occurs when measurements from non-identical baselines are
combined for increased power spectrum sensitivity. This multi-baseline effect
dominates the mode-mixing power in our simulations and can contaminate the EoR
window, an area in Fourier space previously identified to be relatively free of
foreground power.
