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US 8,559,496 B1Granted
Signal reception using non-linearity-compensated, partial response feedback
AssigneeMagnaCom Ltd.
InventorAmir Eliaz
Life of this patent
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Abstract
A receiver may receive a signal that was generated by passage of symbols through a non-linear circuit. An equalizer of the receiver may equalize the received signal based on a first non-linearity compensated, inter-symbol correlated (ISC) feedback signal to generate an equalized signal. The receiver may correct a phase error of the equalized signal to generate a phase-corrected equalized signal. The phase correction may be based on a second, non-linearity compensated, inter-symbol correlated (ISC) feedback signal.
Claims17
A method comprising:
- receiving, in a receiver, an inter-symbol correlated (ISC) signal;
- equalizing, via an equalizer of said receiver, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- and
- correcting, based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal,
- wherein one or both of said first ISC feedback signal and said second ISC feedback signals are partial response signals.
2 more elements
A method comprising:
- receiving, in a receiver, an inter-symbol correlated (ISC) signal;
- equalizing, via an equalizer of said receiver, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- correcting, based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal;
- and
- generating said first ISC feedback signal,
- wherein:
- said received ISC signal passed through a non-linear circuit prior to said receiving;
- and
- said generating said first ISC feedback signal comprises:
- convolving an estimated symbol vector with a plurality of tap coefficients, said convolving resulting in a first estimated ISC signal;
- phase adjusting said first estimated ISC signal to generate a second estimated ISC signal;
- and
- applying a model of said non-linear circuit to said second estimated ISC signal.
10 more elements
A method comprising:
- receiving, in a receiver, an inter-symbol correlated (ISC) signal;
- equalizing, via an equalizer of said receiver, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- correcting, based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal;
- and
- generating said second ISC feedback signal, wherein said generating said second ISC feedback signal comprises:
- convolving an estimated symbol vector with a plurality of tap coefficients, said convolving resulting in a third estimated partial response signal;
- and
- applying a model of a non-linear circuit to said third estimated partial response signal.
5 more elements
A method comprising:
- receiving, in a receiver, an inter-symbol correlated (ISC) signal;
- equalizing, via an equalizer of said receiver, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- correcting, based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal;
- and
- controlling, during run-time of said receiver, a bandwidth of one or both of a first feedback loop comprising said first ISC feedback signal, and a second feedback loop comprising said second ISC feedback signal, said controlling being based on a measured performance indicator.
2 more elements
A system comprising:
- one or more circuits including an equalizer and a phase adjuster, said one or more circuits being operable to:
- receive an inter-symbol correlated (ISC) signal;
- equalize, via said equalizer, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- and
- correct, via said phase adjuster based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal,
- wherein one or both of said first ISC feedback signal and said second ISC feedback signals are partial response signals.
3 more elements
A system comprising:
- one or more circuits including an equalizer and a phase adjuster, said one or more circuits being operable to:
- receive an inter-symbol correlated (ISC) signal;
- equalize, via said equalizer, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- and
- correct, via said phase adjuster based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal,
- wherein:
- said received ISC signal passed through a non-linear circuit en route to said equalizer;
- said one or more circuits are operable to generate said first ISC feedback signal;
- and
- said generation of said first ISC feedback signal comprises:
- convolution of an estimated symbol vector with a plurality of tap coefficients, said convolution resulting in a first estimated partial response signal;
- phase adjustment of said first estimated ISC signal to generate a second estimated ISC signal;
- and
- application of a model of said non-linear circuit to said second estimated partial response signal.
11 more elements
A system comprising:
- one or more circuits including an equalizer and a phase adjuster, said one or more circuits being operable to:
- receive an inter-symbol correlated (ISC) signal;
- equalize, via said equalizer, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- correct, via said phase adjuster based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal;
- and
- generate said second ISC feedback signal, wherein said generation of said second ISC feedback signal comprises:
- convolution of an estimated symbol vector with a plurality of tap coefficients, said convolution resulting in a third estimated partial response signal;
- and
- application of a model of a non-linear circuit to said third estimated partial response signal.
6 more elements
A system comprising:
- one or more circuits including an equalizer and a phase adjuster, said one or more circuits being operable to:
- receive an inter-symbol correlated (ISC) signal;
- equalize, via said equalizer, said received ISC signal to generate an equalized signal, wherein said equalizing is based on a first inter-symbol correlated (ISC) feedback signal;
- and
- correct, via said phase adjuster based on a second ISC feedback signal, a phase error of said equalized signal to generate a phase-corrected equalized signal,
- control, during run-time of said equalizer and/or said phase adjuster, a bandwidth of one or both of a first feedback loop comprising said first ISC feedback signal, and a second feedback loop comprising said second ISC feedback signal, said controlling being based on a measured performance indicator.
3 more elements
A receiver comprising:
- an equalizer whose tap coefficients adapt based on a first inter-symbol correlated (ISC) feedback signal;
- a carrier recovery circuit that attempts to correct phase error of a signal output by said equalizer based on a second ISC feedback signal;
- a sequence estimation circuit that outputs one or more signals from which said first ISC feedback signal and said second ISC feedback signal are generated;
- and
- a partial response filter, an output of which is input to said equalizer.
2 more elements
A receiver comprising:
- an equalizer whose tap coefficients adapt based on a first inter-symbol correlated (ISC) feedback signal;
- a carrier recovery circuit that attempts to correct phase error of a signal output by said equalizer based on a second ISC feedback signal;
- a sequence estimation circuit that outputs one or more signals from which said first ISC feedback signal and said second ISC feedback signal are generated;
- and
- circuitry operable to control, during run-time of said receiver, a bandwidth of one or both of a first feedback loop comprising said first ISC feedback signal, and a second feedback loop comprising said second ISC feedback signal, wherein said control is based on a measured performance indicator.
2 more elements
Dependencies are inferred from the claim text.