  We present a straightforward, noniterative projection scheme that can
represent the electronic ground state of a periodic system on a finite
atomic-orbital-like basis, up to a predictable number of electronic states and
with controllable accuracy. By co-filtering the projections of plane-wave Bloch
states with high-kinetic-energy components, the richness of the finite space
and thus the number of exactly-reproduced bands can be selectively increased at
a negligible computational cost, an essential requirement for the design of
efficient algorithms for electronic structure simulations of realistic material
systems and massive high-throughput investigations.
