Channel Quality Indicator for Wireline Channel Degradation Detection
First Claim
1. An apparatus comprising:
- an interface to transmit signals and receive signals via a channel that includes a cable;
an echo canceller coupled with the interface, the echo canceller to perform echo cancellation based on echo tap values to remove portions of the transmitted signals that appear as echoes within the received signals;
an equalizer coupled with the interface, the equalizer to perform signal equalization based on equalizer tap values, the equalizer tap values being determined based on at least a portion of the received signals to adjust an impulse response of the channel and reduce inter-symbol interference within the received signals; and
circuitry configured to determine a return loss channel quality indicator of the channel based on the echo tap values, determine an insertion loss channel quality indicator of the channel based on the equalizer tap values, or both.
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Accused Products
Abstract
Systems and techniques relating to channel degradation detection for communication systems are described. A described system includes an interface to transmit signals and receive signals via a channel that includes a cable; an echo canceller coupled with the interface, the echo canceller to perform echo cancellation based on echo tap values to remove portions of the transmitted signals that appear as echoes within the received signals; an equalizer coupled with the interface, the equalizer to perform signal equalization based on equalizer tap values, the equalizer tap values being determined based on at least a portion of the received signals to adjust an impulse response of the channel and reduce inter-symbol interference within the received signals; and circuitry configured to determine a return loss channel quality indicator of the channel based on the echo tap values, determine an insertion loss channel quality indicator of the channel based on the equalizer tap values, or both.
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Citations
20 Claims
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1. An apparatus comprising:
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an interface to transmit signals and receive signals via a channel that includes a cable; an echo canceller coupled with the interface, the echo canceller to perform echo cancellation based on echo tap values to remove portions of the transmitted signals that appear as echoes within the received signals; an equalizer coupled with the interface, the equalizer to perform signal equalization based on equalizer tap values, the equalizer tap values being determined based on at least a portion of the received signals to adjust an impulse response of the channel and reduce inter-symbol interference within the received signals; and circuitry configured to determine a return loss channel quality indicator of the channel based on the echo tap values, determine an insertion loss channel quality indicator of the channel based on the equalizer tap values, or both. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method, comprising:
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transmitting signals via a channel that includes a cable; receiving signals via the channel; performing echo cancellation based on echo tap values to remove portions of the transmitted signals that appear as echoes within the received signals; determining equalizer tap values based on at least a portion of the received signals to adjust an impulse response of the channel and reduce inter-symbol interference within the received signals; performing signal equalization based on the equalizer tap values; and determining a channel quality indicator of the channel, wherein determining the channel quality indicator comprises determining a return loss channel quality indicator of the channel based on the echo tap values, determining an insertion loss channel quality indicator of the channel based on the equalizer tap values, or both. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A system comprising:
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a first device; and a second device communicatively coupled with the first device via a channel that includes a cable, wherein the first device comprises (i) an interface to transmit signals and receive signals via the channel and (ii) a processor configured to perform echo cancellation based on echo tap values to remove portions of the transmitted signals that appear as echoes within the received signals, determine equalizer tap values based on at least a portion of the received signals to adjust an impulse response of the channel and reduce inter-symbol interference within the received signals, perform signal equalization based on the equalizer tap values, and determine a return loss channel quality indicator of the channel based on the echo tap values, determine an insertion loss channel quality indicator of the channel based on the equalizer tap values, or both. - View Dependent Claims (18, 19, 20)
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Specification