Wireless full-duplex system and method using sideband test signals
First Claim
1. A method performed in a full-duplex transceiver, comprising:
- generating a combined radio-frequency communication signal including an outgoing radio-frequency communication signal having a center frequency, and a radio-frequency test signal having a center frequency different from the center frequency of the outgoing radio-frequency communication signal;
amplifying the combined radio-frequency communication signal using a power amplifier;
transmitting the amplified combined radio-frequency communication signal from a transmit antenna;
receiving an incoming radio-frequency signal, wherein the incoming radio-frequency signal includes a radio-frequency test component caused by the transmitted radio-frequency test signal and a self-interference component caused by the transmitted radio-frequency communication signal;
demodulating at least the radio-frequency test component to obtain a demodulated test component;
sampling the demodulated test component to obtain a sampled test component; and
processing the sampled test component to determine nonlinear distortion introduced by the power amplifier.
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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.
54 Citations
15 Claims
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1. A method performed in a full-duplex transceiver, comprising:
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generating a combined radio-frequency communication signal including an outgoing radio-frequency communication signal having a center frequency, and a radio-frequency test signal having a center frequency different from the center frequency of the outgoing radio-frequency communication signal; amplifying the combined radio-frequency communication signal using a power amplifier; transmitting the amplified combined radio-frequency communication signal from a transmit antenna; receiving an incoming radio-frequency signal, wherein the incoming radio-frequency signal includes a radio-frequency test component caused by the transmitted radio-frequency test signal and a self-interference component caused by the transmitted radio-frequency communication signal; demodulating at least the radio-frequency test component to obtain a demodulated test component; sampling the demodulated test component to obtain a sampled test component; and processing the sampled test component to determine nonlinear distortion introduced by the power amplifier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification