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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an efficient algorithm to compute the discrete Fourier transform (DFT) and its inverse.
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the process of designing a filter.
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a device or process that transforms a signal by selectively choosing specific frequencies and leaving others with appropriate gain or as it is.
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a type of a signal processing filter whose impulse response is of finite duration.
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filters with a finite duration impulse response.
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a mathematical operation that decomposes a function into its constituent frequencies, known as a frequency spectrum.
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the number of cycles (of the signal) per second.
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the quantitative measure of the output spectrum of a system or device in response to a stimulus, and is used to characterize the dynamics of the system.
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The frequency spectrum of a time-domain signal is a representation of that signal in the frequency domain.
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a frequency modulation scheme in which digital information is transmitted through discrete frequency changes of carrier waves.
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The fundamental frequency of a periodic or quasi-periodic function is the reciprocal of the shortest period of the periodic function.