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US 2010/0150032 A1Published application
Software radio frequency canceller
AssigneeGeneral Electric Company
InventorsRichard Louis Zinser, Michael James Hartman, John Erik Hershey, John Anderson Fergus Ross
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Abstract
A full-duplex RF communication system and corresponding methods use digital adaptive filters for interference cancellation. As provided, the techniques allow full-duplex radio frequency communication without frequency-, time-, or code-division multiplexing and without the use of hardware RF cancellers. Such techniques may be useful for wireless communication, such a cellular communication, radio communication, broadcasting, short-range point-to-point communication, wireless sensor networks, and wireless computer networks.
Claims27
A method comprising:
- receiving an analog primary signal from a receiver front end, an antenna, or a receiver input port;
- receiving an analog reference signal from a transmitter;
- converting the analog primary signal into a digital primary signal;
- converting the analog reference signal into a digital reference sigal;
- and
- processing the digital reference signal with a digital adaptive filter, wherein the digital adaptive filter uses the digital reference and primary signals as inputs for determining filter weights of the digital adaptive filter to provide an output;
- and
- subtracting the output of the digital adaptive filter from the digital primary signal to generate a digital cancelled signal.
5 more elements
A device programmed with machine-readable instructions for:
- receiving an analog primary signal from a receiver front end, an antenna, or a receiver input port;
- receiving an analog reference signal from a transmitter;
- converting the analog primary signal into a digital primary signal with a first analog to digital converter;
- converting the analog reference signal into a digital reference sigal with a second analog to digital converter;
- and
- processing the digital reference signal with a digital adaptive filter, wherein the digital adaptive filter uses the digital reference and primary signals as inputs for determining filter weights of the digital adaptive filter to provide an output;
- and
- subtracting the output of the digital adaptive filter from the digital primary signal to generate a digital cancelled signal.
5 more elements
A full-duplex wireless communication system comprising:
- a receiver front end, an antenna, or a receiver input port capable of receiving an analog primary signal;
- a transmitter capable of transmitting an analog transmitted signal;
- a directional coupler capable of sampling a portion of the analog transmitted signal to provide an analog reference signal;
- a first analog to digital converter capable of converting the analog primary signal into a digital primary signal;
- a second analog to digital converter capable of converting the analog reference signal into a digital reference sigal;
- and
- a processor comprising instructions for:
- processing the digital reference signal with an adaptive filter, wherein the adaptive filter uses the digital reference and primary signals as inputs for determining filter weights of the adaptive filter to provide an output;
- and
- subtracting the output of the adaptive filter from the digital primary signal to generate a digital cancelled signal.
7 more elements
A full-duplex wireless communication system comprising:
- a receiver front end, an antenna, or a receiver input port capable of receiving an analog primary signal;
- a transmitter capable of transmitting an analog transmitted signal, wherein the transmitter is co-located with the receiver front end, the antenna, or the receiver input port;
- a directional coupler capable of sampling a portion of the analog transmitted signal to provide an analog reference signal;
- a first high-speed analog to digital converter capable of converting the analog primary signal into a digital primary signal;
- a second high-speed analog to digital converter capable of converting the analog reference signal into a digital reference sigal;
- and
- a processor comprising instructions for:
- processing the digital reference signal with a single-loop adaptive filter, wherein the adaptive filter uses the digital reference and primary signals as inputs for determining filter weights of the adaptive filter to provide an output;
- and
- subtracting the output of the adaptive filter from the digital primary signal to generate a digital cancelled signal, wherein the digital cancelled signal is not further processed with a hardware filter.
7 more elements
Dependencies are inferred from the claim text.