Method, apparatus and system for eliminating self-interference in a full-duplex communication
First Claim
1. A method for processing an interference signal, the method comprising:
- receiving a radio signal comprising a self-interference signal of a transmit antenna, the self-interference signal comprises a first self-interference signal and a second self-interference signal, power of the first self-interference signal is greater than a first power threshold, a time delay of the first self-interference signal is less than a first time delay threshold, power of the second self-interference signal is less than the first power threshold and greater than a second power threshold, and a time delay of the second self-interference signal is greater than the first time delay threshold and less than a second time delay threshold;
performing primary interference cancellation processing, by using a first reference signal, on the received radio signal to eliminate the first self-interference signal, wherein the first reference signal is obtained by coupling a local transmit signal; and
performing secondary interference cancellation processing, by using a second reference signal, on the received radio signal after the primary interference cancellation processing to eliminate the second self-interference signal, wherein the second reference signal is obtained by coupling a local transmit signal.
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Abstract
Embodiments of the present invention provide a method, an apparatus, and a system for processing an interference signal, so as to eliminate an interference signal in a full duplex multi-antenna system. The method includes: receiving a radio signal, where the signal includes a self-interference signal of a transmit antenna, and the self-interference signal includes a first self-interference signal, and a second self-interference signal; performing primary interference cancellation processing, by using a first reference signal, on the received signal to eliminate the first self-interference signal; and performing secondary interference cancellation processing, by using a second reference signal, on the signal after the primary interference cancellation processing to eliminate the second self-interference signal.
17 Citations
27 Claims
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1. A method for processing an interference signal, the method comprising:
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receiving a radio signal comprising a self-interference signal of a transmit antenna, the self-interference signal comprises a first self-interference signal and a second self-interference signal, power of the first self-interference signal is greater than a first power threshold, a time delay of the first self-interference signal is less than a first time delay threshold, power of the second self-interference signal is less than the first power threshold and greater than a second power threshold, and a time delay of the second self-interference signal is greater than the first time delay threshold and less than a second time delay threshold; performing primary interference cancellation processing, by using a first reference signal, on the received radio signal to eliminate the first self-interference signal, wherein the first reference signal is obtained by coupling a local transmit signal; and performing secondary interference cancellation processing, by using a second reference signal, on the received radio signal after the primary interference cancellation processing to eliminate the second self-interference signal, wherein the second reference signal is obtained by coupling a local transmit signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for processing an interference signal, the apparatus comprising:
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one or more local transmit antennas; a receiving circuit configured to receive a radio signal comprising a self-interference signal of the one or more local transmit antennas, the self-interference signal comprises a first self-interference signal and a second self-interference signal, power of the first self-interference signal is greater than a first power threshold, a time delay of the first self-interference signal is less than a first time delay threshold, power of the second self-interference signal is less than the first power threshold and greater than a second power threshold, and a time delay of the second self-interference signal is greater than the first time delay threshold and less than a second time delay threshold; a primary interference cancellation processing circuit configured to perform primary interference cancellation processing, by using a first reference signal, on the received radio signal to eliminate the first self-interference signal, wherein the first reference signal is obtained by coupling a local transmit signal; and a secondary interference cancellation processing circuit configured to perform secondary interference cancellation processing, by using a second reference signal, on the received radio signal after the primary interference cancellation processing to eliminate the second self-interference signal, wherein the second reference signal and the first reference signal are the same. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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27. A system having an interference signal elimination function, the system comprising:
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a sending apparatus; and an apparatus for processing an interference signal, the apparatus for processing the interference signal comprising; one or more local transmit antennas; a receiving circuit configured to receive a radio signal comprising a self-interference signal of the one or more local transmit antennas, the self-interference signal comprises a first self-interference signal and a second self-interference signal, power of the first self-interference signal is greater than a first power threshold, a time delay of the first self-interference signal is less than a first time delay threshold, power of the second self-interference signal is less than the first power threshold and greater than a second power threshold, and a time delay of the second self-interference signal is greater than the first time delay threshold and less than a second time delay threshold; a primary interference cancellation processing circuit configured to perform primary interference cancellation processing, by using a first reference signal, on the received radio signal to eliminate the first self-interference signal, wherein the first reference signal is obtained by coupling a local transmit signal; and a secondary interference cancellation processing circuit configured to perform secondary interference cancellation processing, by using a second reference signal, on the received radio signal after the primary interference cancellation processing to eliminate the second self-interference signal, wherein the second reference signal and the first reference signal are the same; and the sending apparatus is configured to send a radio signal to be received by the apparatus for processing the interference signal.
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Specification