  In this paper we carry out the asymptotic diversity analysis for
millimeter-wave (mmWave) massive multiple-input multiple-output (MIMO) systems
by using bit interleaved coded multiple beamforming (BICMB). First, a
single-user mmWave system which employs $M_t$ antenna subarrays at the
transmitter and $M_r$ antenna subarrays at the receiver is studied. Each
antenna subarray in the transmitter and the receiver has $N_r$ and $N_t$
antennas, respectively. We establish a theorem for the diversity gain when the
number of antennas in each remote antenna unit (RAU) goes to infinity. Based on
the theorem, the distributed system with BICMB achieves full spatial
multiplexing of $L_t=\sum_{i,j}L_{ij}$ and full spatial diversity of
$\frac{\left(\sum_{i,j}\beta_{ij}\right)^2}{\sum_{i,j}\beta_{ij}^2L_{ij}^{-1}}$
where $L_{ij}$ is the number of propagation paths and $\beta_{ij}$ is the large
scale fading coefficient between the $i$th RAU in the transmitter and the $j$th
RAU in the receiver. This result shows that one can increase the diversity gain
in the system by increasing the number of RAUs. Simulation results show that,
when the perfect channel state information assumption is satisfied, the use of
BICMB increases the diversity gain in the system.
