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US 11,451,363 B2Granted
Digital-centric full-duplex architecture
AssigneeApple Inc.
InventorBernhard Raaf
Life of this patent
Estimating the term…
Abstract
A full-duplex radio device is disclosed. The full-duplex radio device includes an analog transmission (TX) circuit that includes a power amplifier to output an analog TX signal. The full-duplex radio device also includes a feedback receiver circuit coupled to the analog TX circuit. The feedback receiver circuit provides a digital representation of the analog TX signal that is used to digitally cancel at least a transmitter noise component of a self-interference signal associated with a transmission of the analog TX signal in the full-duplex radio device.
Claims22
A full-duplex radio device configured to cancel a self-interference signal in a digital domain, the full-duplex radio device comprising:
- a digital transmission circuit configured to output a digital transmission baseband signal;
- an analog transmission circuit coupled to the digital transmission circuit and configured to receive the digital transmission baseband signal and output an analog transmission signal;
- an analog receiver circuit configured to receive the self-interference signal via a circulator coupled between the analog transmission circuit and the analog receiver circuit, and wherein the analog receiver is configured to convert the self-interference signal from a carrier frequency to an analog representation of the self-interference signal in baseband;
- a feedback receiver circuit, coupled to the analog transmission circuit and configured to output a digital representation of the analog transmission signal;
- and
- a digital receiver circuit coupled to the digital transmission circuit, the analog receiver circuit, and the feedback receiver circuit, wherein the digital receiver circuit is configured to:
- convert the analog representation of the self-interference signal in baseband received from the analog receiver circuit to a digital representation of the self-interference signal in baseband;
- and
- combine the digital representation of the self-interference signal in baseband, the digital representation of the analog transmission signal received from the feedback receiver circuit, and the digital transmission baseband signal received from the digital transmission circuit to cancel at least a transmitter noise component of the self-interference signal associated with a transmission of the analog TX signal in the full-duplex radio device.
6 more elements
A method for a full-duplex radio device, comprising:
- providing, to a digital receiver circuit, a digital transmission baseband signal via a digital transmission circuit, an analog transmission signal via an analog transmission circuit, an analog representation of a self-interference signal in baseband via an analog receiver circuit, and a digital representation of the analog transmission signal via a feedback receiver circuit;
- converting the analog representation of the self-interference signal in baseband received provided via the analog receiver circuit to a digital representation of the self-interference signal in baseband;
- and
- combining the digital representation of the self-interference signal in baseband, the digital representation of the analog transmission signal received from the feedback receiver circuit, and the digital transmission baseband signal received from the digital transmission circuit to cancel at least a transmitter noise component of the self-interference signal associated with a transmission of the analog TX signal in the full-duplex radio device.
1 more element
A user equipment device (UE), comprising:
- a digital transmission circuit configured to output a digital transmission baseband signal;
- an analog transmission circuit coupled to the digital transmission circuit and configured to receive the digital transmission baseband signal and output an analog transmission signal;
- an analog receiver circuit configured to receive the self-interference signal via a circulator coupled between the analog transmission circuit and the analog receiver circuit, and wherein the analog receiver is configured to convert the self-interference signal from a carrier frequency to an analog representation of the self-interference signal in baseband;
- a feedback receiver circuit, coupled to the analog transmission circuit and configured to output a digital representation of the analog transmission signal;
- and
- a digital receiver circuit coupled to the digital transmission circuit, the analog receiver circuit, and the feedback receiver circuit, wherein the digital receiver circuit is configured to:
- convert the analog representation of the self-interference signal in baseband received from the analog receiver circuit to a digital representation of the self-interference signal in baseband;
- and
- combine the digital representation of the self-interference signal in baseband, the digital representation of the analog transmission signal received from the feedback receiver circuit, and the digital transmission baseband signal received from the digital transmission circuit to cancel at least a transmitter noise component of the self-interference signal associated with a transmission of the analog TX signal in the full-duplex radio device.
6 more elements
Dependencies are inferred from the claim text.