Quadrature error correction using polynomial models in tone calibration
First Claim
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1. A method for calibrating an I/O. receiver, comprising:
- receiving, from a tone calibration estimator, a first set of mismatch parameters indicating a mismatch between I and Q channels of the I/O. receiver, wherein the first set of mismatch parameters includes a total gain mismatch parameter and a total phase mismatch parameter, and wherein the tone calibration estimator is to inject test tones at frequencies within a test spectrum into the I/O. receiver; and
estimating, by a polynomial calibration estimator, a second set of mismatch parameters from the first set of mismatch parameters using a polynomial model, wherein the second set of mismatch parameters includes a frequency-dependent gain mismatch parameter, a frequency-dependent phase mismatch parameter, and a frequency-independent phase mismatch parameter.
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Abstract
One example embodiment provides a system, apparatus, and method for using polynomial models in tone calibration for quadrature error correction in I/Q receivers. In one example embodiment, method for calibrating an I/Q receiver is provided and includes receiving a first mismatch parameter indicating a mismatch between I and Q channels of the I/Q receiver; and estimating a second mismatch parameter from the first mismatch parameter using a polynomial model.
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Citations
20 Claims
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1. A method for calibrating an I/O. receiver, comprising:
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receiving, from a tone calibration estimator, a first set of mismatch parameters indicating a mismatch between I and Q channels of the I/O. receiver, wherein the first set of mismatch parameters includes a total gain mismatch parameter and a total phase mismatch parameter, and wherein the tone calibration estimator is to inject test tones at frequencies within a test spectrum into the I/O. receiver; and estimating, by a polynomial calibration estimator, a second set of mismatch parameters from the first set of mismatch parameters using a polynomial model, wherein the second set of mismatch parameters includes a frequency-dependent gain mismatch parameter, a frequency-dependent phase mismatch parameter, and a frequency-independent phase mismatch parameter. - View Dependent Claims (2, 3, 4, 5, 6)
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7. An apparatus for calibrating an I/O. receiver, the apparatus comprising:
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a polynomial estimator to; receive a first mismatch parameters, from a tone calibration estimator, wherein the first mismatch parameter indicates a mismatch between I and Q channels of the I/Q. receiver, and estimate a second mismatch parameter from the first mismatch parameter estimation using a polynomial model; a tone generator to generate N tone signals over a test frequency spectrum and input the tone signals into analog paths of the I/O. receiver; a transform block, coupled to an end of a particular analog path, to transform a signal received at the end of the particular analog path from a time domain signal to a frequency domain signal and to output the frequency domain signal; and the tone calibration estimator, coupled to the transform block and the polynomial estimator, to receive the frequency domain signal from the transform block, perform tone calibration on the frequency domain signal to generate the first mismatch parameter, and provide the first mismatch parameter to the polynomial estimator. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. An apparatus for calibrating an I/O. receiver, comprising:
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a tone calibration estimator to inject test tones at frequencies within a test spectrum into the I/O. receiver, estimate a first set of mismatch parameters comprising a total gain mismatch parameter and a total phase mismatch parameter, and output the first set of mismatch parameters; and a polynomial calibration estimator coupled to the tone calibration estimator, the polynomial calibration estimator to receive the first set of mismatch parameters from the tone calibration estimator and estimate a second set of mismatch parameters from the first set of mismatch parameters using a polynomial model, the second set of mismatch parameters comprising a frequency-dependent gain mismatch parameter, a frequency-dependent phase mismatch parameter, and a frequency-independent phase mismatch parameter. - View Dependent Claims (15)
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16. One or more non-transitory computer readable media having instructions thereon that, in response to execution by one or more processing devices of an apparatus, cause the apparatus to provide a polynomial calibration estimator to:
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receive, from a tone calibration estimator, a first set of mismatch parameters indicating a mismatch between I and Q channels of the I/O. receiver, wherein the first set of mismatch parameters includes a total gain mismatch parameter and a total phase mismatch parameter, and wherein the tone calibration estimator is to inject test tones at frequencies within a test spectrum into the I/O. receiver; and estimate a second set of mismatch parameters from the first set of mismatch parameters using a polynomial model, wherein the second set of mismatch parameters includes a frequency-dependent gain mismatch parameter, a frequency-dependent phase mismatch parameter, and a frequency-independent phase mismatch parameter. - View Dependent Claims (17, 18, 19, 20)
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Specification