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