System and method for estimating noise characteristics in the presence of non-stationary noise
First Claim
1. A method for estimating error in an input signal, the method comprising the steps of:
- measuring a magnitude of a plurality of data samples from said input signal;
defining as an error sample each one of said plurality of data samples when the magnitude of said data sample is at least equal to a first threshold, such that a plurality of error samples are defined;
calculating a power for each one of said plurality of error samples; and
specifying an error indicator, said error indicator corresponding to an average of said calculated powers, wherein said error indicator represents the power of the error in said input signal.
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Abstract
A thresholding noise estimator detects and samples an error signal during a sampling period. When the magnitude of a noise sample, also known as an error sample, is at least equal to a predefined threshold, the power of that error sample is calculated. At the end of the sampling period, the computed powers of the error samples (only those data samples having a magnitude at least equal to the predefined threshold) are averaged. This average power corresponds to an error indicator which quantitatively indicates the power for that portion(s) of an error signal which is at least equal to the threshold. Alternative embodiments provide for magnitude hysteresis, time hysteresis, or both magnitude and time hysteresis in the determination of an error indicator. Also, alternative embodiments provide for adding the power of the peak error sample to the average power in the determination of an error indicator, or, provide for adding an interleaved average peak power to the average power in the determination of an error indicator.
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Citations
71 Claims
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1. A method for estimating error in an input signal, the method comprising the steps of:
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measuring a magnitude of a plurality of data samples from said input signal;
defining as an error sample each one of said plurality of data samples when the magnitude of said data sample is at least equal to a first threshold, such that a plurality of error samples are defined;
calculating a power for each one of said plurality of error samples; and
specifying an error indicator, said error indicator corresponding to an average of said calculated powers, wherein said error indicator represents the power of the error in said input signal. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 68, 69)
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32. A system for estimating error in an input signal, comprising:
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means for measuring the magnitude of a plurality of data samples from said input signal;
means for defining as an error sample each one of said plurality of data samples when the magnitude of said data sample is at least equal to a first threshold, such that a plurality of error samples are defined;
means for calculating a power for each one of said plurality of error samples; and
means for specifying an error indicator, said error indicator corresponding to an average of said calculated powers, wherein said error indicator represents the power of the error in said input signal. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 70, 71)
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63. A computer readable medium having a program for storing a series of instructions for estimating error in an input signal, the program for performing at least the following:
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measuring the magnitude of a plurality of data samples from said input signal;
defining as an error sample each one of said plurality of data samples when the magnitude of said data sample is at least equal to a first threshold, such that a plurality of error samples are defined;
calculating a power for each one of said plurality of error samples; and
specifying an error indicator, said error indicator corresponding to an average of said calculated powers, wherein said error indicator represents the power of the error in said input signal. - View Dependent Claims (64, 65, 66, 67)
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Specification