Frequency-shift keying: Difference between revisions
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'''Frequency-shift keying (FSK)''' is a form of [[frequency modulation]] in which the modulating [[signal]] shifts the [[output]] frequency between predetermined values. |
'''Frequency-shift keying (FSK)''' is a form of [[frequency modulation]] in which the modulating [[signal]] shifts the [[output]] frequency between predetermined values. |
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Usually, the instantaneous frequency is shifted between two discrete values termed the |
Usually, the instantaneous frequency is shifted between two discrete values termed the mark frequency and the space frequency. This is a noncoherent form of FSK. |
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[[coherence (physics)|Coherent]] forms of FSK exist in which there is no [[phase (waves)|phase]] discontinuity in the output signal. |
[[coherence (physics)|Coherent]] forms of FSK exist in which there is no [[phase (waves)|phase]] discontinuity in the output signal. |
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Revision as of 16:31, 25 November 2005
Frequency-shift keying (FSK) is a form of frequency modulation in which the modulating signal shifts the output frequency between predetermined values.
Usually, the instantaneous frequency is shifted between two discrete values termed the mark frequency and the space frequency. This is a noncoherent form of FSK.
Coherent forms of FSK exist in which there is no phase discontinuity in the output signal.
Other names for FSK are frequency-shift modulation and frequency-shift signaling.
See also
- Amplitude-shift keying
- Multiple frequency-shift keying (MFSK)
- Orthogonal frequency division multiplexing
- Phase-shift keying