Multiple frequency-shift keying (MFSK) is a variation of frequency-shift keying (FSK) that uses more than two frequencies. MFSK is a form of M-ary orthogonal modulation, where each symbol consists of one element from an alphabet of orthogonal waveforms. M, the size of the alphabet, is usually a power of two so that each symbol represents log2M bits.
- M is usually between 2 and 64
- Error Correction is generally also used
Read more about Multiple Frequency-shift Keying: MFSK Fundamentals
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