System and Method for the Adjustment of Compensation Applied to a Signal
First Claim
1. A method for adjusting a signal, comprising:
- applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal, the output signal comprising even phase and odd phase;
selecting either the even phase or the odd phase at which to begin sampling;
using a clock signal, beginning at the selected phase, sampling the output signal to generate a plurality of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal;
adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value; and
after adjusting the at least one of the loss compensation and the offset compensation applied to the signal based on the sampled error value, selecting either the even phase or the odd phase at which to begin the next sampling.
1 Assignment
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Accused Products
Abstract
In one embodiment of the present invention, a method for adjusting a signal includes applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal, the output signal comprising even phase and odd phase. The method also includes selecting either the even phase or the odd phase at which to begin sampling. The method further includes, using a clock signal, beginning at the selected phase, sampling the output signal to generate a plurality of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal. The method also includes adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value. The method further includes, after adjusting the at least one of the loss compensation and the offset compensation applied to the signal based on the sampled error value, selecting either the even phase or the odd phase at which to begin the next sampling.
85 Citations
44 Claims
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1. A method for adjusting a signal, comprising:
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applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal, the output signal comprising even phase and odd phase; selecting either the even phase or the odd phase at which to begin sampling; using a clock signal, beginning at the selected phase, sampling the output signal to generate a plurality of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value; and after adjusting the at least one of the loss compensation and the offset compensation applied to the signal based on the sampled error value, selecting either the even phase or the odd phase at which to begin the next sampling. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for adjusting a signal, comprising:
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applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion to generate an output signal; selecting, in a random manner, a point in a first re-sampling cycle at which to begin sampling the output signal; using a clock signal, beginning at the selected point, sampling the output signal to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; and adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method for adjusting a signal, comprising:
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applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal to generate an output signal; selecting a point in a first re-sampling cycle at which to begin sampling the output signal; using a clock signal, beginning at the selected point, sampling the output signal in the first re-sampling cycle to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the first set; determining whether at least one of the loss compensation and the offset compensation applied to the signal is adjusted based on the error value of the first set; if the at least one of the loss compensation and the offset compensation applied to the signal is not adjusted; using the clock signal, beginning at a point corresponding to the selected point in the first re-sampling cycle, sampling the output signal in a second re-sampling cycle to generate a second set of data values and an error value; adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the second set; and if the at least one of the loss compensation and the offset compensation applied to the signal is adjusted; using the clock signal, beginning at a point corresponding to the next point after the selected point in the first re-sampling cycle, sampling the output signal in the second re-sampling cycle to generate a second set of data values and an error value; and adjusting none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the second set. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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22. An adaptive equalizer, comprising:
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an equalizer configured to apply at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal, the output signal comprising even phase and odd phase; a sampler configured to; receive the output signal and a clock signal; select either the even phase or the odd phase at which to begin sampling; and using the clock signal, beginning at the selected phase, sample the output signal to generate a plurality of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; and a controller configured to; adjust none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value; and after adjusting the at least one of the loss compensation and the offset compensation applied to the signal based on the sampled error value, select either the even phase or the odd phase at which to begin the next sampling. - View Dependent Claims (23, 24, 25, 26, 27, 28)
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29. An adaptive equalizer, comprising:
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an equalizer configured to apply at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal; a sampler configured to; receive the output signal and a clock signal; select, in a random manner, a point in a first re-sampling cycle at which to begin sampling the output signal; and using the clock signal, beginning at the selected point, sample the output signal to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; and a controller configured to adjust none, one, or more of the loss compensation and the offset compensation applied to the signal based on the sampled error value. - View Dependent Claims (30, 31, 32, 33, 34, 35)
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36. An adaptive equalizer, comprising:
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an equalizer configured to apply at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal; a sampler configured to; receive the output signal and a clock signal; select a point in a first re-sampling cycle at which to begin sampling the output signal; and using the clock signal, beginning at the selected point in the first re-sampling cycle, sample the output signal to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; and a controller configured to; adjust none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the first set; and determine whether at least one of the loss compensation and the offset compensation applied to the signal is adjusted based on the error value of the first set; wherein if the at least one of the loss compensation and the offset compensation applied to the signal is not adjusted; the sampler is further configured to, using the clock signal and beginning at a point corresponding to the selected point in the first re-sampling cycle, sample the output signal in a second re-sampling cycle to generate a second set of data values and an error value; and the controller is further configured to adjust none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the second set; and wherein if the at least one of the loss compensation and the offset compensation applied to the signal is adjusted; the sampler is further configured to, using the clock signal and beginning at a point corresponding to the next point after the selected point in the first re-sampling cycle, sample the output signal in the second re-sampling cycle to generate a second set of data values and an error value; and the controller is further configured to adjust none, one, or more of the loss compensation and the offset compensation applied to the signal based on the error value of the second set. - View Dependent Claims (37, 38, 39, 40, 41, 42)
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43. A method for adjusting a signal, comprising:
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applying at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal; selecting a point in a first re-sampling cycle at which to begin sampling the output signal; using a clock signal, beginning at the selected point, sampling the output signal to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; randomly generating a number for the selected point; and determining whether to adjust at least one of the loss compensation and the offset compensation applied to the signal based on; one or more of the first set of sampled data values and error value; and the value of the number randomly generated for the selected point.
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44. An adaptive equalizer, comprising:
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an equalizer configured to apply at least one of a loss compensation for frequency-dependent distortion and an offset compensation for DC-offset distortion to a signal before or after the distortion occurs to generate an output signal; a sampler configured to; receive the output signal and a clock signal; select a point in a first re-sampling cycle at which to begin sampling the output signal; and using a clock signal, beginning at the selected point, sample the output signal to generate a first set of data values and an error value, the error value indicating residue of the distortion based on the sampling of the output signal; a pseudo-random number generator configured to randomly generate a number for the selected point; and a controller configured to determine whether to adjust at least one of the loss compensation and the offset compensation applied to the signal based on; one or more of the first set of sampled data values and error value; and the value of the number randomly generated for the selected point.
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Specification