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- M元正交擴頻M -ary orthogonal spread spectrum
- M元擴頻M-ary spread spectrum
- 元primary
- M元頻移鍵控MFSK
- M元雙正交鍵控MBOK
- 擴enlarge
- M元多碼MC-CDMA系統M-ary multi-code MC-CDMA system
- 一種達到理論上限的新型擴頻序列集A Novel Spread Spectrum Sequence Set up to Upper Bound of Theory
- M元雙正交脈沖位置調制M-ary biorthogonal pulse position modulation
- 擴增augmentation
- 頻數frequence
- 百元century
- 擴招increase enrollment
- 主頻dominant frequency
- 多元multivariant
- 倍頻frequency doubling
- 一元dollar
- 擴孔hole slash
- 載頻carrier frequency
- 元的[計] meta
