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US 12,334,965 B1Granted
Narrowband cancellation for received signal
AssigneeEthernovia Inc.
InventorsHossein Sedarat, Ramin Shirani, Roy T. Myers, Jr., Darren S. Engelkemier
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Abstract
Various embodiments described herein provide for narrowband cancellation for a signal received at a receiver in a communication system. In particular, some embodiments implement a narrowband canceller (NBC) that is configured to cancel a narrowband signal from a transmitted signal that is received by a first physical layer device from a second physical layer device over a communication medium.
Claims20
A physical layer device comprising:
- a first combiner configured to generate a narrowband-cancelled input signal by combining an input signal and a narrowband cancellation signal, the physical layer device being a first physical layer device, the input signal being based on a data signal transmitted from a second physical layer device to the first physical layer device over a data transmission medium;
- a second combiner configured to generate a slicer input signal by combining the narrowband-cancelled input signal and a decision feedback equalization signal;
- a data slicer configured to generate a sample signal by sampling the slicer input signal;
- a decision feedback equalizer configured to generate the decision feedback equalization signal based on the sample signal;
- a third combiner configured to generate an error sample signal by combining the decision feedback equalization signal, the sample signal, and the input signal;
- and
- a narrowband canceller configured to collect a set of previous error sample signals provided by the third combiner, and to generate the narrowband cancellation signal based on the error sample signal and a predicted narrowband interference frequency value, the predicted narrowband interference frequency value being determined by the narrowband canceller based on the set of previous error sample signals.
4 more elements
A physical layer device comprising:
- a first combiner configured to generate a narrowband-cancelled input signal by combining an input signal and a narrowband cancellation signal, the physical layer device being a first physical layer device, the input signal being based on a data signal transmitted from a second physical layer device to the first physical layer device over a data transmission medium;
- a second combiner configured to generate a slicer input signal by combining the narrowband-cancelled input signal and a decision feedback equalization signal;
- a data slicer configured to generate a sample signal by sampling the slicer input signal;
- a decision feedback equalizer configured to generate the decision feedback equalization signal based on the sample signal;
- a third combiner configured to generate an error sample signal by combining the decision feedback equalization signal, the sample signal, and the input signal;
- and
- a narrowband canceller configured to generate the narrowband-cancelled input signal based on the error sample signal and a known narrowband frequency value.
4 more elements
A method comprising:
- generating, by a first combiner of a first physical layer device, a narrowband-cancelled input signal by combining an input signal and a narrowband cancellation signal, the input signal being based on a data signal transmitted from a second physical layer device to the first physical layer device over a data transmission medium;
- generating, by a second combiner of the first physical layer device, a slicer input signal by combining the narrowband-cancelled input signal and a decision feedback equalization signal;
- generating, by a data slicer of the first physical layer device, a sample signal by sampling the slicer input signal;
- generating, by a decision feedback equalizer of the first physical layer device, the decision feedback equalization signal based on the sample signal;
- generating, by a third combiner of the first physical layer device, an error sample signal by combining the decision feedback equalization signal, the sample signal, and the input signal;
- and
- generating, by a narrowband canceller of the first physical layer device, the narrowband cancellation signal based on the error sample signal.
4 more elements
Dependencies are inferred from the claim text.