| 摘要 |
<p>In one embodiment, at each of a plurality of first instances of time, a phase of a first signal at a first frequency from a transmitter is determined. At each of a plurality of second instances of time, a phase of a second signal at a second frequency from the transmitter is determined, A position or velocity of the transmitter is determined based at least in part on the phases of the first and second signals at the first and second instances of time.</p> |
