  RadioWeaves network operates a large number of distributed antennas using
cell-free architecture to provide high data rates and support a large number of
users. Operating this network in an energy-efficient manner in the limited
available spectrum is crucial. Therefore, we consider energy efficiency (EE)
maximization of a RadioWeaves network that shares spectrum with a collocated
primary network in underlay mode. To simplify the problem, we lower bound the
non-convex EE objective function to form a convex problem. We then propose a
downlink power allocation policy that maximizes the EE of the secondary
RadioWeaves network subject to power constraint at each access point and
interference constraint at each primary user. Our numerical results investigate
the secondary system's performance in interference, power, and EE constrained
regimes with correlated fading channels. Furthermore, they show that the
proposed power allocation scheme performs significantly better than the simpler
equal power allocation scheme.
