# US 12,120,069 B2 · Full-duplex self-interference weakening method and full-duplex self-interference weakening system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,120,069 B2 - Document ID: US12120069B2 - Status: Granted - Kind: B2 - Application number: 17/949,848 - Filed: 2022-09-21 - Published: 2023-11-30 - Granted: 2024-10-15 - Earliest claimed: 2018-04-19 - Assignees: Huawei Technologies Co., Ltd. - Applicants: Huawei Technologies Co., Ltd. - Inventors: Jingjing Huang; Ming Gan; Xin Zuo - Web page: https://patentgrep.com/patent/US12120069B2 ## CPC - H04L 5/1461: {Suppression of signals in the return path, i.e. bidirectional control circuits} - H01Q 9/0435: {using two feed points} - H04B 1/10: Means associated with receiver for limiting or suppressing noise or interference - H04B 1/12: Neutralising, balancing, or compensation arrangements - H04B 1/525: with means for reducing leakage of transmitter signal into the receiver - H04L 5/0023: {Time-frequency-space} - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H01Q: ANTENNAS, i.e. RADIO AERIALS (radiators or antennas for microwave heating H05B6/72) - H04B: TRANSMISSION ## Abstract This application provides a full-duplex self-interference weakening method and a full-duplex self-interference weakening system. The full-duplex self-interference weakening method includes: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna; and adjusting and combining the signal received by the first port of the dual-polarized receive antenna and/or the signal received by the second port of the dual-polarized receive antenna, to weaken interference caused by the transmit antenna to the dual-polarized receive antenna. The full-duplex self-interference weakening method and the full-duplex self-interference weakening system provided in this application resolve a problem that a quantity of antennas and an antenna location are limited in an existing antenna interference cancelation method. ## Claims ### Claim 1 A non-transitory computer-readable medium storing a program, wherein the program, when executed, causes a computer to perform a full-duplex self-interference weakening operation, the operation comprising: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna; adjusting the signal received by the first port of the dual-polarized receive antenna, wherein the adjusting the signal received by the first port of the dual-polarized receive antenna comprises: adjusting at least one of a phase or an amplitude of the signal received by the first port of the dual-polarized receive antenna; and combining the adjusted signal with the signal received by the second port of the dual-polarized receive antenna. ### Claim 2 (depends on 1) The computer-readable recording medium according to claim 1, wherein the first port of the dual-polarized receive antenna has a first polarization direction, the second port of the dual-polarized receive antenna has a second polarization direction, the transmit antenna has a third polarization direction, and the first polarization direction, the second polarization direction, and the third polarization direction are orthogonal to each other. ### Claim 3 (depends on 1) The computer-readable recording medium according to claim 1, wherein a phase difference between two to-be-combined signals is an odd multiple of 180 degrees. ### Claim 4 (depends on 1) The computer-readable recording medium according to claim 1, wherein amplitudes of the two to-be-combined signals are the same. ### Claim 5 An apparatus, comprising: at least one processor configured to: separately receive, from a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna; adjust the signal received by the first port of the dual-polarized receive antenna, wherein the adjusting the signal received by the first port of the dual-polarized receive antenna comprises: adjusting at least one of a phase or an amplitude of the signal received by the first port of the dual-polarized receive antenna; and combine the adjusted signal with the signal received by the second port of the dual-polarized receive antenna. ### Claim 6 (depends on 5) The apparatus according to claim 5, wherein the first port of the dual-polarized receive antenna has a first polarization direction, the second port of the dual-polarized receive antenna has a second polarization direction, the transmit antenna has a third polarization direction, and the first polarization direction, the second polarization direction, and the third polarization direction are orthogonal to each other. ### Claim 7 (depends on 5) The apparatus according to claim 5, wherein a phase difference between two to-be-combined signals is an odd multiple of 180 degrees. ### Claim 8 (depends on 5) The apparatus according to claim 5, wherein amplitudes of the two to-be-combined signals are the same. ### Claim 9 A method, comprising: separately receiving, by a first port of a dual-polarized receive antenna and a second port of the dual-polarized receive antenna, a signal sent by a transmit antenna; adjusting the signal received by the first port of the dual-polarized receive antenna, wherein the adjusting the signal received by the first port of the dual-polarized receive antenna comprises: adjusting at least one of a phase or an amplitude of the signal received by the first port of the dual-polarized receive antenna; and combining the adjusted signal with the signal received by the second port of the dual-polarized receive antenna. ### Claim 10 (depends on 9) The method according to claim 9, wherein the first port of the dual-polarized receive antenna has a first polarization direction, the second port of the dual-polarized receive antenna has a second polarization direction, the transmit antenna has a third polarization direction, and the first polarization direction, the second polarization direction, and the third polarization direction are orthogonal to each other. ### Claim 11 (depends on 9) The method according to claim 9, wherein a phase difference between two to-be-combined signals is an odd multiple of 180 degrees. ### Claim 12 (depends on 9) The method according to claim 9, wherein amplitudes of the two to-be-combined signals are the same.