Wireless full-duplex system and method using sideband test signals
First Claim
1. A method comprising:
- filtering an outgoing signal via an adaptive corrective filter at a transmitter;
transmitting the outgoing signal which causes self-interference to a receiver coupled to the transmitter, the receiver and the transmitter configured for cable modem applications, wherein the transmitter and the receiver collectively form a full-duplex data transceiver or a full-duplex amplify-and-forward relay to assist a central node in serving one or more distant client nodes, the filtered signal providing a corrective signal for correcting self-interference;
receiving an incoming data signal at the receiver; and
adding the corrective signal to the received data signal to reduce self-interference from the transmitter to the receiver.
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Abstract
A full-duplex transceiver is provided with componentry and methods for cancellation of nonlinear self-interference signals. The transceiver is capable of receiving an incoming radio-frequency signal that includes both a desired radio-frequency signal component and a self-interference component caused by the transceiver'"'"'s own radio-frequency transmission. The transceiver demodulates the incoming radio-frequency signal to generate a first demodulated signal. The transceiver combines an analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference. The transceiver processes the first and second demodulated signals to determine a desired incoming baseband signal and to determine nonlinear components of the self-interference signal, such as nonlinearities introduced by the transceiver'"'"'s power amplifier.
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Citations
12 Claims
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1. A method comprising:
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filtering an outgoing signal via an adaptive corrective filter at a transmitter; transmitting the outgoing signal which causes self-interference to a receiver coupled to the transmitter, the receiver and the transmitter configured for cable modem applications, wherein the transmitter and the receiver collectively form a full-duplex data transceiver or a full-duplex amplify-and-forward relay to assist a central node in serving one or more distant client nodes, the filtered signal providing a corrective signal for correcting self-interference; receiving an incoming data signal at the receiver; and adding the corrective signal to the received data signal to reduce self-interference from the transmitter to the receiver. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A transceiver comprising:
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a transmitter configured to filter an outgoing signal via an adaptive corrective filter and transmit the outgoing signal; a receiver coupled to the transmitter, the receiver receiving self-interference due to th outgoing signal from the transmitter, the receiver and the transmitter configured for cable modem applications, wherein the transmitter and the receiver collectively form a full-duplex data transceiver or a full-duplex amplify-and-forward relay to assist a central node in serving one or more distant client nodes, the filtered signal providing a corrective signal for correcting self-interference, wherein the receiver is configured to receive an incoming data signal and add the corrective signal to the received data signal to reduce self-interference from the transmitter to the receiver.
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Specification