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US 8,428,111 B2Granted
Crosstalk emission management
AssigneeBroadcom Corporation
InventorsMagesh Valliappan, Howard Baumer, Anthony Brewster, Vivek Telang
Life of this patent
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Abstract
Various embodiments are disclosed relating to crosstalk emission management. In an example embodiment, an amplitude of a main tap of a transmit equalizer may be determined to limit crosstalk emitted from a local channel to one or more other channels to be less than a threshold. A ratio of an amplitude of at least one secondary tap of the transmit equalizer to the amplitude of the main tap may be determined to provide equalization to the local channel.
Claims18
A method comprising:
- setting an amplitude of a main tap of a transmit equalizer to limit crosstalk emitted from a local channel to one or more other channels to be less than a threshold;
- determining a ratio of an amplitude of at least one secondary tap of the transmit equalizer to the amplitude of the main tap to provide equalization to the local channel;
- and
- setting the amplitude of the at least one secondary tap of the transmit equalizer to provide the determined ratio, wherein a sum of absolute values of the amplitudes of the main tap and the at least one secondary tap is less than or equal to a maximum amplitude range.
1 more element
An apparatus comprising:
- a transmit equalizer having a main tap associated with a main pulse output from the equalizer and at least one secondary tap associated with at least one secondary pulse output from the equalizer;
- wherein:
- an amplitude of the main tap of the transmit equalizer is configured to limit crosstalk emitted from a local channel to one or more other channels to be a fixed value or to be less than a threshold;
- a ratio of an amplitude of the at least one secondary tap of the transmit equalizer to the amplitude of the main tap is configured to provide equalization to the local channel;
- and
- wherein a sum of absolute values of the amplitudes of the main tap and the at least one secondary tap is less than or equal to a maximum amplitude range.
3 more elements
A system comprising:
- a transmitter including a transmit equalizer configured to:
- determine a ratio of a main tap to one or more secondary taps to provide equalization to a local channel, the main tap and the one or more secondary taps each of which being associated with a pulse of a signal output by the transmitter;
- wherein an amplitude of a main pulse associated with the main tap is less than or equal to a maximum main tap amplitude configured to limit crosstalk emitted from the local channel to one or more other channels to be less than a threshold;
- and
- wherein a sum of absolute values of amplitudes of the main tap and the at least one secondary tap is less than or equal to a maximum amplitude range;
- and
- a receiver configured to receive the signal output by the transmitter via the local channel.
4 more elements
Dependencies are inferred from the claim text.