Transceiver including programmable self-interference canceller for full-duplex and time division duplex modes
AssigneeQUALCOMM Incorporated
InventorsLi LIU, Seyyed Hassan MOUSAVI
Life of this patent
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Abstract
A wireless communication apparatus comprising: a power amplifier (PA); a transmit coupler including a first input port coupled to an output of the PA, a first coupled port, and a first isolated port; a self-interference (SI) canceller; a first switching device coupled between the first coupled port of the transmit coupler and an input of the SI canceller; a low noise amplifier (LNA); a receive coupler including a transmitted port coupled to an input of the LNA, a coupled port, and an isolated port; and a second switching device coupled between an output of the SI canceller and the coupled port of the receive coupler.
Claims25
A wireless communication apparatus, comprising:
- a power amplifier (PA);
- a transmit coupler including a first input port coupled to an output of the PA and a first coupled port;
- a self-interference (SI) canceller;
- a first switching device coupled between the first coupled port of the transmit coupler and an input of the SI canceller;
- a low noise amplifier (LNA);
- a receive coupler including a transmitted port coupled to an input of the LNA and a coupled port;
- and
- a second switching device coupled between an output of the SI canceller and the coupled port of the receive coupler.
A transceiver, comprising:
- a power amplifier configured to generate a transmit radio frequency (RF) signal;
- a transmit coupler configured to route the transmit RF signal to a transmit antenna, wherein the transmit coupler is configured to be selectively enabled to generate a first sampled transmit RF signal in accordance with a first mode of operation, and wherein the transmit coupler is configured to be selectively disabled in accordance with a second mode of operation;
- a self-interference (SI) canceller configured to generate a leaked transmit cancelling RF signal based on the first sampled transmit RF signal;
- and
- a receive coupler configured to route a receive RF signal from a receive antenna to a low noise amplifier (LNA), wherein the receive coupler is configured to substantially cancel out a leaked portion of the transmit RF signal using the leaked transmit cancelling RF signal.
A method, comprising:
- routing a transmit RF signal to a transmit antenna;
- generating a first sampled transmit RF signal in accordance with a first mode of operation;
- not generating the first sampled transmit RF signal in accordance with a second mode of operation;
- generating a leaked transmit cancelling RF signal based on the first sampled transmit RF signal;
- and
- substantially cancelling out a leaked portion of the transmit RF signal received via a receive antenna using the leaked transmit cancelling RF signal.
A wireless communication apparatus, comprising:
- a power amplifier (PA);
- a first transmit coupler coupled to an output of the PA, the first transmit coupler having a first level of coupling;
- a second transmit coupler coupled to the output of the PA, the second transmit coupler having a second level of coupling different than the first level of coupling;
- a low noise amplifier (LNA);
- a receive coupler coupled to an input of the LNA;
- and
- a self-interference cancellation circuit selectively coupled to the second transmit coupler and selectively coupled to the receive coupler.
Dependencies are inferred from the claim text.