Synchronization and Delay Estimation with Sub-Tick Resolution
Sprache des Vortragstitels:
Asilomar Conf. Sig. Syst. and Comput.
Sprache des Tagungstitel:
We consider the problem of clock synchronization
between a pair of nodes using round-trip communication where
only the initiating node collects time stamps, and where no time
stamps are exchanged. These time stamps are the current timer
values at the event of transmission or reception of a signal.
Traditionally, the timer is modeled by a continuous function,
i.e. as affine clock in case of asynchronism in clock skew and
clock phase. In this work we deviate from the traditional model
and propose a discrete-valued clock model, which is motivated
by observations from real hardware. Employing the clock model
allows us to find a new signaling model for round-trip time
measurements, which enables us to simultaneously estimate clock
skew, clock phase and propagation delay with a resolution below
one clock tick period. Hence, we set a first step towards enabling
high timing resolution with limited clock hardware.