  User demand for increasing amounts of wireless capacity continues to outpace
supply, and so to meet this demand, significant progress has been made in new
MIMO wireless physical layer techniques. Higher-performance systems now remain
impractical largely only because their algorithms are extremely computationally
demanding. For optimal performance, an amount of computation that increases at
an exponential rate both with the number of users and with the data rate of
each user is often required. The base station's computational capacity is thus
becoming one of the key limiting factors on wireless capacity. QuAMax is the
first large MIMO centralized radio access network design to address this issue
by leveraging quantum annealing on the problem. We have implemented QuAMax on
the 2,031 qubit D-Wave 2000Q quantum annealer, the state-of-the-art in the
field. Our experimental results evaluate that implementation on real and
synthetic MIMO channel traces, showing that 10~$\mu$s of compute time on the
2000Q can enable 48 user, 48 AP antenna BPSK communication at 20 dB SNR with a
bit error rate of $10^{-6}$ and a 1,500 byte frame error rate of $10^{-4}$.
