Feedback receiver (FBRX) path and closed loop control for transmitter (TX) interference cancellation
AssigneeQUALCOMM Incorporated
InventorsDai Lu, Cong Nguyen, Charline Hao
Life of this patent
Estimating the term…
Abstract
Certain aspects of the present disclosure are directed towards apparatus and techniques for wireless communication. An example apparatus generally includes: a first transmit chain; a first receive chain; a first coupler coupled to the first transmit chain; a second coupler coupled to the first receive chain; a first analog interference cancellation (AIC) circuit having an input coupled to the first coupler and an output coupled to the first receive chain; and a first routing device coupled between the first coupler and the input of the first AIC circuit, the first routing device being further coupled between the first coupler and a digital interference cancellation (DIC) circuit.
Claims30
An apparatus for wireless communication, comprising:
- a first transmit chain;
- a first receive chain;
- a first coupler coupled to the first transmit chain;
- a second coupler coupled to the first receive chain;
- a first analog interference cancellation (AIC) circuit having an input coupled to the first coupler and an output coupled to the first receive chain via the second coupler;
- and
- a first routing device coupled between the first coupler and the input of the first AIC circuit, the first routing device being further coupled between the first coupler and a digital interference cancellation (DIC) circuit, the first routing device being configured to selectively couple the first coupler to one of the first AIC circuit and the DIC circuit.
A method for wireless communication, comprising:
- transmitting a first transmit signal via a first transmit chain;
- receiving a first receive signal via a first receive chain;
- providing, to a first routing device via a first coupler, a first interference signal representing a signal at a node of the transmit chain;
- and
- providing, via the first routing device, the first interference signal to at least one of a first analog interference cancellation (AIC) circuit or a digital interference cancellation (DIC) circuit, an output of the first AIC circuit being coupled to a second coupler, wherein the second coupler is coupled to the first receive chain, wherein providing the first interference signal via the first routing device comprises selectively coupling the first coupler to one of the first AIC circuit and the DIC circuit via the first routing device.
An apparatus for wireless communication, comprising:
- means for generating a transmit signal;
- means for processing a receive signal;
- a first means for providing an interference signal representing a signal at a node of the means for generating;
- an analog interference cancellation (AIC) circuit configured to process the interference signal to yield an interference reduction signal;
- a second means for providing the interference reduction signal to the means for processing;
- and
- means for selectively coupling the first means for providing to one of the AIC circuit and a DIC circuit.
Dependencies are inferred from the claim text.