enow.com Web Search

Search results

  1. Results from the WOW.Com Content Network
  2. Frequency-shift keying - Wikipedia

    en.wikipedia.org/wiki/Frequency-shift_keying

    An example of binary FSK. Frequency-shift keying (FSK) is a frequency modulation scheme in which digital information is encoded on a carrier signal by periodically shifting the frequency of the carrier between several discrete frequencies. [1]

  3. Multiple frequency-shift keying - Wikipedia

    en.wikipedia.org/.../Multiple_frequency-shift_keying

    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.

  4. IEC 61334 - Wikipedia

    en.wikipedia.org/wiki/IEC_61334

    S-FSK (spread frequency-shift keying) is a modulation scheme that combines some of the advantages of classical spread-spectrum modulation (immunity against narrow-band interference) with some of the advantages of classical frequency-shift keying (FSK is low complexity).

  5. Minimum-shift keying - Wikipedia

    en.wikipedia.org/wiki/Minimum-shift_keying

    In digital modulation, minimum-shift keying (MSK) is a type of continuous-phase frequency-shift keying that was developed in the late 1950s by Collins Radio employees Melvin L. Doelz and Earl T. Heald. [1] Similar to OQPSK, MSK is encoded with bits alternating between quadrature components, with the Q component delayed by half the symbol period.

  6. Modulation - Wikipedia

    en.wikipedia.org/wiki/Modulation

    The most fundamental digital modulation techniques are based on keying: PSK (phase-shift keying): a finite number of phases are used. FSK (frequency-shift keying): a finite number of frequencies are used. ASK (amplitude-shift keying): a finite number of amplitudes are used.

  7. Keying (telecommunications) - Wikipedia

    en.wikipedia.org/wiki/Keying_(telecommunications)

    Several keying techniques exist, including phase-shift keying, frequency-shift keying, and amplitude-shift keying. Bluetooth, for example, uses phase-shift keying to exchange information between devices. An overview of keying techniques is given at Modulation § Fundamental digital modulation methods

  8. Phase-shift keying - Wikipedia

    en.wikipedia.org/wiki/Phase-shift_keying

    Phase-shift keying (PSK) is a digital modulation process which conveys data by changing (modulating) the phase of a constant frequency carrier wave. The modulation is accomplished by varying the sine and cosine inputs at a precise time. It is widely used for wireless LANs, RFID and Bluetooth communication.

  9. Frequency modulation - Wikipedia

    en.wikipedia.org/wiki/Frequency_modulation

    Digital data can be encoded and transmitted with a type of frequency modulation known as frequency-shift keying (FSK), in which the instantaneous frequency of the carrier is shifted among a set of frequencies. The frequencies may represent digits, such as '0' and '1'.