Wireless communications in the terahertz band have been recently proposed as
complement to conventional wired interconnects within computing packages. Such
environments are typically highly reverberant, hence showing long channel
impulse responses and severely limiting the achievable rates. Fortunately, this
communications scenario is static and can be pre-characterized, which opens the
door to techniques such as time reversal. Time reversal acts a spatial matched
filter and has a spatiotemporal focusing effect, which allows not only to
increase the achievable symbol rates, but also to create multiple spatial
channels. In this paper, the multi-user capability of time reversal is explored
in the context of wireless communications in the terahertz band within a
computing package. Full-wave simulations are carried out to validate the
approach, whereas modulation streams are simulated to evaluate the error rate
as a function of the transmitted power, symbol rate, and number of simultaneous
transmissions