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A tag is a keyword or label that categorizes your question with other, similar questions. Using the right tags makes it easier for others to find and answer your question.

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a filter that self-adjusts its transfer function according to an optimization algorithm driven by an error signal.
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a method expressed in a finite list of steps of well-defined instructions to process a signal.
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In signal processing and related disciplines, aliasing refers to an effect that causes different signals to become indistinguishable (or aliases of one another) when sampled.
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for questions related to filters that change the phase relationship of a signal, but does not change the gain (amplitude) of the signals.
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Audio, or in terms of signal processing, an audio signal is an analog or digital representation of sound, typically as an electrical voltage.
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Supplemental sensory input
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the cross-correlation of a signal with itself.
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a signal processing technique applied in the time domain, intended to increase the strength of a signal relative to noise that is obscuring it.
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a device that passes frequencies within a certain range and rejects (attenuates) frequencies outside that range.
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the difference between the upper and lower frequencies in a contiguous set of frequencies
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for any question regarding or utilizing Bayesian Estimation (Bayesian Estimator). This family includes (Among others) the Kalman Filter, the MAP Estimator and the MMSE.
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Forming a beam (directional gain) and, sometimes, shifting the beam direction.
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referred to either analog or digital second order filters