Invention Grant
- Patent Title: Self-interference cancellation for full-duplex communication using a phase and gain adjusted transmit signal
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Application No.: US14722641Application Date: 2015-05-27
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Publication No.: US09825665B2Publication Date: 2017-11-21
- Inventor: Alex Mirzaei , Hooman Darabi
- Applicant: Avago Technologies General IP (Singapore) Pte. Ltd.
- Applicant Address: SG Singapore
- Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
- Current Assignee: Avago Technologies General IP (Singapore) Pte. Ltd.
- Current Assignee Address: SG Singapore
- Agency: Sterne, Kessler, Goldstein & Fox P.L.L.C.
- Main IPC: H04B1/10
- IPC: H04B1/10 ; H04B1/525

Abstract:
The present disclosure is directed to an apparatus and method for cancelling self-interference caused by full-duplex communication. In a full-duplex communication device, the receiver will generally experience significant self-interference from the full-duplex communication device's own transmitter transmitting a strong outbound signal over the same channel that the receiver is to receive a weak inbound signal. The apparatus and method are configured to adjust a phase and gain of the outbound signal provided at the output of a power amplifier (PA) and inject the phase and gain adjusted outbound signal at the input of a low-noise amplifier (LNA) to cancel the interference from the outbound signal in the inbound signal.
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