CPC G01S 13/84 (2013.01) [G01S 7/003 (2013.01); H04W 4/02 (2013.01)] | 19 Claims |
1. A radio frequency (RF)-based positioning device, comprising:
an RF receiver;
a signal processor operable to:
receive a receive (RX) signal from the RF receiver, the RX signal comprising a carrier signal, timing information, a reference signal, and an envelope
modulation;
estimate an RX time-of-arrival of the RX signal and a time offset between the RF receiving and the signal processor based on the timing information and the reference signal;
based on the estimated time of arrival and the time offset, resolve a phase of the carrier signal; and
determine a position state based on the resolved phase of the carrier signal.
|