Interference cancellation methods and apparatus
AssigneeGenXComm, Inc.
InventorsHardik Jain, Che-Chun Lin
Life of this patent
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Abstract
Methods and apparatus for reducing and/or canceling signal interference between receiver and transmitter components of a wireless communications device are described. The methods and apparatus are well suited for use in a wide range of devices including user equipment devices such as cell phones as well as in network equipment such a base stations. Opto-mechanical devices are used in some embodiments as part of an apparatus which performs interference cancelation on RF (Radio Frequency) signals.
Claims22
An apparatus comprising:
- a digital interference cancelation element between a digital transmit element and a receiver element for generating a filter delay control signal and a baseband interference cancelation signal;
- a combining element in an RF receiver signal path;
- and
- an RF cancelation filter positioned between an RF transmit signal path and the combining element in an RF receiver signal path, the combining element receiving at a first input an RF frequency signal generated by the RF cancelation filter from a signal received from the RF signal transmit path which is delayed in accordance with delay control information received from the digital interference cancelation element.
A method of performing radio frequency (RF) interference cancelation comprising:
- supplying an RF signal to a transducer that oscillates to produce an acoustic signal which carries said RF signal;
- receiving at a control input a control signal;
- using the control signal to control phonon-photon transduction of the acoustic signal which carries the RF signal on to an optical signal being communicated through a waveguide;
- and
- performing an optical to electrical conversion on an optical signal that exits the waveguide to produce an electrical interference cancelation signal;
- and
- using said electrical interference cancelation signal in an interference cancelation operation performed on a received RF signal which includes interference.
A radio frequency (RF) interference cancelation apparatus:
- a transducer that oscillates to produce an acoustic signal which carries an RF signal supplied as an input to said transducer;
- a control input that receives a control signal used to control phonon-photon transduction of the acoustic signal which carries the RF signal on to an optical signal being communicated through a waveguide;
- an optical to electrical converter that converts an optical signal that exits the waveguide to an electrical interference cancelation signal;
- and
- a combiner for combining said electrical interference cancelation signal with a received RF signal which includes interference.
Dependencies are inferred from the claim text.