Patent ID: 11923889
Assignee: FUTUREWEI TECHNOLOGIES, INC.
Field: Measurement (Instruments)
Classification: CPC H  G | IPC G  H

Claim 8:
9. A method comprising:
generating a source signal for wireless transmission from at least one antenna;
receiving an ingoing radio frequency (RF) signal that is a reflection of the source signal from an object; and
processing the ingoing RF signal, the processing comprising:
mixing the ingoing RF signal, producing a down converted mixer output signal;
subtracting a leakage cancellation signal from the down converted mixer output signal by a subtraction circuitry disposed electrically between a mixer and an analog-to-digital converter;
producing a digital mixer output signal that is based upon the down converted mixer output signal;
converting a digital signal to an analog signal to produce the leakage cancellation signal;
selectively coupling, based on a control signal, the down converted mixer output signal or ground to the subtraction circuitry; and
selectively coupling, based on a second control signal, the leakage cancellation signal or ground to the subtraction circuitry.