Patent ID: 11921229
Assignee: TEXAS INSTRUMENTS INCORPORATED
Field: Measurement (Instruments)
Classification: CPC G | IPC G

Claim 7:
8. An integrated circuit comprising:
a receiver configured to determine a first beat signal based on received and transmitted radar signals;
a processor coupled to the receiver and configured to:
receive the first beat signal;
compensate for a phase shift of the first beat signal to generate a compensated first beat signal, including determine an estimated phase difference by:
determining a frequency and a phase of the first beat signal;
demodulating the first beat signal based on the frequency and the phase to produce an intermediate signal; and
determining the estimated phase difference as a value of the intermediate signal at a time zero;

filter the compensated first beat signal to produce a second beat signal;
determine a first distance for an object based on a frequency associated with the second beat signal;
determine a first phase based on the first distance;
determine a second phase based on at least one of the compensated first beat signal or the second beat signal; and
determine a second distance for the object based on the second phase.