Sideband

（重定向自Upper Sideband）

The power of an AM signal plotted against frequency.Key: fc is the carrier frequency, fm is the maximum modulation frequency

Sidebands are evident in this spectrogram of an AM broadcast (The carrier is highlighted in red, the two mirrored audio spectra (green) are the lower and upper sideband).

In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process. The sidebands consist of all the Fourier components of the modulated signal except the carrier. All forms of modulation produce sidebands.

单词	Upper Sideband
释义	Upper Sideband 英语百科 Sideband （重定向自Upper Sideband） In radio communications, a sideband is a band of frequencies higher than or lower than the carrier frequency, containing power as a result of the modulation process. The sidebands consist of all the Fourier components of the modulated signal except the carrier. All forms of modulation produce sidebands.
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