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IEVref:702-04-49ID:
Language:enStatus: Standard
Term: energy spectral density
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Definition: the distribution as a function of frequency of the energy of a signal, or a noise, having a continuous spectrum and finite total energy

NOTE 1 – The total energy of a signal or noise is by convention proportional to the time integral of the square of its instantaneous value. This integral is proportional to a physical energy if the characteristic quantity is a field quantity.

NOTE 2 – The energy spectral density of a deterministic signal exists if its representative time function is integrable square. It is equal to the squared modulus of the Fourier transform of a signal and also equals the Fourier transform of the autocorrelation function of the signal.


Publication date:1992-03
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