  Time of flight cameras may emerge as the 3-D sensor of choice. Today, time of
flight sensors use phase-based sampling, where the phase delay between emitted
and received, high-frequency signals encodes distance. In this paper, we
present a new time of flight architecture that relies only on frequency---we
refer to this technique as frequency-domain time of flight (FD-TOF). Inspired
by optical coherence tomography (OCT), FD-TOF excels when frequency bandwidth
is high. With the increasing frequency of TOF sensors, new challenges to time
of flight sensing continue to emerge. At high frequencies, FD-TOF offers
several potential benefits over phase-based time of flight methods.
