Wireless full-duplex system and method with self-interference sampling
First Claim
1. A method performed in a full-duplex transceiver, comprising:
- generating a first analog corrective signal;
receiving an incoming radio-frequency signal, wherein the incoming radio-frequency signal includes a self-interference component and a desired radio-frequency signal component;
demodulating the incoming radio-frequency signal to generate a first demodulated signal;
combining the first analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference;
sampling the first demodulated signal to obtain a sampled self-interference component; and
processing at least the second demodulated signal and the sampled self-interference component to determine a desired incoming baseband signal.
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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
31 Claims
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1. A method performed in a full-duplex transceiver, comprising:
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generating a first analog corrective signal; receiving an incoming radio-frequency signal, wherein the incoming radio-frequency signal includes a self-interference component and a desired radio-frequency signal component; demodulating the incoming radio-frequency signal to generate a first demodulated signal; combining the first analog corrective signal with the first demodulated signal to generate a second demodulated signal with reduced self-interference; sampling the first demodulated signal to obtain a sampled self-interference component; and processing at least the second demodulated signal and the sampled self-interference component to determine a desired incoming baseband signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A full-duplex transceiver comprising:
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a radio-frequency modulator configured to modulate an outgoing baseband signal into an outgoing radio-frequency communication signal; a transmit antenna configured to transmit the outgoing radio-frequency communication signal; a receive antenna configured to receive an incoming radio-frequency signal; a radio-frequency demodulator configured to demodulate the incoming radio-frequency signal to generate a first demodulated signal; a baseband correction module configured to generate a baseband analog corrective signal based on the outgoing baseband signal; baseband signal addition circuitry configured to add the baseband analog corrective signal to the first demodulated signal to generate a second demodulated signal; a first analog-to-digital converter configured to sample the first demodulated signal; a second analog-to-digital converter configured to sample the second demodulated signal; and a digital decoding module configured to determine a desired incoming baseband signal based at least on the sampled first and second demodulated signals. - View Dependent Claims (27, 28, 29, 30, 31)
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Specification