  Continuous monitoring of vital signs is of paramount importance. These
critical physiological parameters play a crucial role in the early detection of
conditions that affect the well-being of a patient. However, conventional
contact-based devices are inappropriate for long-term monitoring. Besides
mobility restrictions, they can cause epidermal damage, and even lead to
pressure necrosis. In this paper we present a selection of recent works towards
enabling the contactless monitoring of vital signs using radar devices. The
selected contributions are threefold: an algorithm for recovering the chest
wall movements from radar signals; a random body movement and interference
mitigation technique; and a robust and accurate adaptive estimation framework.
These contributions were tested in different scenarios, spanning ideal
simulation settings, real data collected while imitating common working
conditions in an office environment, and a complete validation with premature
babies in a critical care environment.
