  This work revisits a recently proposed precoding design for massive
multiple-input multiple output (MIMO) systems that is based on the use of an
instantaneous total power constraint. The main advantages of this technique lie
in its suitability to single RF MIMO systems coupled with a very-high power
efficiency. Such features have been proven using simulations for uncorrelated
channels. Based on tools from random matrix theory, we propose in this work to
analyze the performance of this precoder for more involved channels accounting
for spatial correlation. The obtained expressions are then optimized in order
to maximize the signal-to-interference-plus-noise ratio (SINR). Simulation
results are provided in order to illustrate the performance of the optimized
precoder in terms of peak-to-average power ratio (PAPR) and
signal-to-interference-plus-noise ratio (SINR).
